NCBI Home Page NCBI Site Search page NCBI Guide that lists and describes the NCBI resources
Conserved domains on  [gi|1238723754|ref|WP_095367139|]
View 

23S rRNA pseudouridine(2605) synthase RluB [Pseudoalteromonas sp. NBT06-2]

Protein Classification

Graphical summary

 Zoom to residue level

show extra options »

Show site features     Horizontal zoom: ×

List of domain hits

Name Accession Description Interval E-value
PRK10700 super family cl32559
23S rRNA pseudouridine(2605) synthase RluB;
9-295 2.92e-142

23S rRNA pseudouridine(2605) synthase RluB;


The actual alignment was detected with superfamily member PRK10700:

Pssm-ID: 182659 [Multi-domain]  Cd Length: 289  Bit Score: 401.84  E-value: 2.92e-142
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   9 EKLQKVLARAGKGSRREMEKVIDAGRVSIDGKVSRLGDRV--GPHQQIRLDGHVVKIEAEENRICRVLMYNKPEGELCTR 86
Cdd:PRK10700    3 EKLQKVLARAGHGSRREIESIIEAGRVSVDGKIATLGDRVevTPGLKIRIDGHLISVKESAEQICRVLAYYKPEGELCTR 82
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  87 KDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVEL 166
Cdd:PRK10700   83 NDPEGRPTVFDRLPKLRGARWIAVGRLDVNTCGLLLFTTDGELANRLMHPSREVEREYAVRVFGQVDDAKLRQLSRGVQL 162
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 167 EDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQGGWEELALANVNYFRS 246
Cdd:PRK10700  163 EDGPAAFKTIKFSGGEGINQWYNVTLTEGRNREVRRLWEAVGVQVSRLIRVRYGDIPLPKGLPRGGWTELDLAQTNYLRE 242
                         250       260       270       280       290
                  ....*....|....*....|....*....|....*....|....*....|
gi 1238723754 247 SVQLPNETETKLSVMPEKRsekRAKNQRIRKAVKKH-QIRAKQVQKKRKK 295
Cdd:PRK10700  243 LVELPPETSSKVAVEKDRR---RMKANQIRRAVKRHsQVSGGRRSGGRNN 289
 
Name Accession Description Interval E-value
PRK10700 PRK10700
23S rRNA pseudouridine(2605) synthase RluB;
9-295 2.92e-142

23S rRNA pseudouridine(2605) synthase RluB;


Pssm-ID: 182659 [Multi-domain]  Cd Length: 289  Bit Score: 401.84  E-value: 2.92e-142
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   9 EKLQKVLARAGKGSRREMEKVIDAGRVSIDGKVSRLGDRV--GPHQQIRLDGHVVKIEAEENRICRVLMYNKPEGELCTR 86
Cdd:PRK10700    3 EKLQKVLARAGHGSRREIESIIEAGRVSVDGKIATLGDRVevTPGLKIRIDGHLISVKESAEQICRVLAYYKPEGELCTR 82
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  87 KDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVEL 166
Cdd:PRK10700   83 NDPEGRPTVFDRLPKLRGARWIAVGRLDVNTCGLLLFTTDGELANRLMHPSREVEREYAVRVFGQVDDAKLRQLSRGVQL 162
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 167 EDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQGGWEELALANVNYFRS 246
Cdd:PRK10700  163 EDGPAAFKTIKFSGGEGINQWYNVTLTEGRNREVRRLWEAVGVQVSRLIRVRYGDIPLPKGLPRGGWTELDLAQTNYLRE 242
                         250       260       270       280       290
                  ....*....|....*....|....*....|....*....|....*....|
gi 1238723754 247 SVQLPNETETKLSVMPEKRsekRAKNQRIRKAVKKH-QIRAKQVQKKRKK 295
Cdd:PRK10700  243 LVELPPETSSKVAVEKDRR---RMKANQIRRAVKRHsQVSGGRRSGGRNN 289
RsuA COG1187
Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 [Translation, ...
9-236 4.34e-105

Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 [Translation, ribosomal structure and biogenesis]; Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 is part of the Pathway/BioSystem: 16S rRNA modification


Pssm-ID: 440800 [Multi-domain]  Cd Length: 226  Bit Score: 305.42  E-value: 4.34e-105
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   9 EKLQKVLARAGKGSRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQIRLDGHVVKIEAEenriCRVLMYNKPEGELCTRK 87
Cdd:COG1187     3 MRLQKFLANAGVGSRREAEELIEAGRVTVNGKvVTELGTKVDPGDEVTVDGKPLKLPEE----PVYLLLNKPAGVVSTTK 78
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  88 DPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELE 167
Cdd:COG1187    79 DPEGRPTVFDLLPEARKERLFPVGRLDKDTEGLLLLTNDGELAHRLTHPKYGVEKEYLVRVDGPVTEEDLERLREGVELE 158
                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1238723754 168 DGMAKFLKITPRpGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLnPKLPQGGWEEL 236
Cdd:COG1187   159 DGPTKPAKVEIL-SGEANTWLRITLTEGRNRQVRRMFEAVGLPVVRLKRVRIGPLTL-GDLPPGEWREL 225
PseudoU_synth_RluB cd02556
Pseudouridine synthase, Escherichia coli RluB like; This group is comprised of bacterial and ...
72-236 2.23e-88

Pseudouridine synthase, Escherichia coli RluB like; This group is comprised of bacterial and eukaryotic proteins similar to E. coli RluB. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. E.coli RluB makes psi2605 in 23S RNA. psi2605 has been detected in eubacteria but, not in eukarya and archea despite the presence of a precursor U at that site.


Pssm-ID: 211330 [Multi-domain]  Cd Length: 167  Bit Score: 260.70  E-value: 2.23e-88
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  72 RVLMYNKPEGELCTRKDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGE 151
Cdd:cd02556     1 RVLIYHKPEGLICTRKDPKGRPTVFDLLPKLGIPRWISVGRLDLNTEGLLLFTNDGELANRLMHPSNEIEREYAVRVFGQ 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 152 VEATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQG 231
Cdd:cd02556    81 VTDEQLKSLKKGVELEDGFAGFKSIQLEGGEGKNSWYRVTLREGRNREVRRLWEAFGLQVSRLIRIRYGPIFLPGNLKRG 160

                  ....*
gi 1238723754 232 GWEEL 236
Cdd:cd02556   161 QWEEL 165
TIGR00093 TIGR00093
pseudouridine synthase; This model identifies panels of pseudouridine synthase enzymes that ...
110-238 7.89e-50

pseudouridine synthase; This model identifies panels of pseudouridine synthase enzymes that RNA modifications involved in maturing the protein translation apparatus. Counts per genome vary: two in Staphylococcus aureus, three in Pseudomonas putida, four in E. coli, etc. [Protein synthesis, tRNA and rRNA base modification]


Pssm-ID: 272902  Cd Length: 128  Bit Score: 161.34  E-value: 7.89e-50
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 110 VGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYN 189
Cdd:TIGR00093   1 VGRLDRDSEGLLLLTNDGELVHRLTHPGHHHEKEYLVTVEGPVTDEDLEALRKGVQLEDGKTKPAKLKVITEPGFPTWLR 80
                          90       100       110       120
                  ....*....|....*....|....*....|....*....|....*....
gi 1238723754 190 VLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNpKLPQGGWEELAL 238
Cdd:TIGR00093  81 VTLSEGRNRQVRRMFAAVGFPVLRLHRVRIGDVSLN-GLPPGEWRPLTL 128
PseudoU_synth_2 pfam00849
RNA pseudouridylate synthase; Members of this family are involved in modifying bases in RNA ...
73-202 1.20e-18

RNA pseudouridylate synthase; Members of this family are involved in modifying bases in RNA molecules. They carry out the conversion of uracil bases to pseudouridine. This family includes RluD, a pseudouridylate synthase that converts specific uracils to pseudouridine in 23S rRNA. RluA from E. coli converts bases in both rRNA and tRNA.


Pssm-ID: 459961 [Multi-domain]  Cd Length: 151  Bit Score: 80.53  E-value: 1.20e-18
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 VLMYNKPEGELCTRKDPEG---RPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMR--PSYEIEREYAVR 147
Cdd:pfam00849   1 YIVVNKPAGVPVHPTDSLTkllSLLALLLRRELGVKRLYPVHRLDKNTSGLLLLAKDGEAANKLNKlfPERKIEKEYLAL 80
                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1238723754 148 VFGEVEatTLKTLTTGVELEDGMAKF--------------LKITPRPGEGINRWYNVLLTEGRNREVRR 202
Cdd:pfam00849  81 VDKPEE--EEGTIKSPIKKEKNKSPFrkeeelggkkavthLKVLKSGSKGDYSLLELELVTGRKHQIRA 147
S4 smart00363
S4 RNA-binding domain;
11-63 4.18e-04

S4 RNA-binding domain;


Pssm-ID: 214638 [Multi-domain]  Cd Length: 60  Bit Score: 37.96  E-value: 4.18e-04
                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*
gi 1238723754   11 LQKVLARAG-KGSRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQIRLDGHVVKI 63
Cdd:smart00363   3 LDKFLARLGlAPSRSQARRLIEQGRVKVNGKkVTKPSYIVKPGDVISVRGKELKR 57
 
Name Accession Description Interval E-value
PRK10700 PRK10700
23S rRNA pseudouridine(2605) synthase RluB;
9-295 2.92e-142

23S rRNA pseudouridine(2605) synthase RluB;


Pssm-ID: 182659 [Multi-domain]  Cd Length: 289  Bit Score: 401.84  E-value: 2.92e-142
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   9 EKLQKVLARAGKGSRREMEKVIDAGRVSIDGKVSRLGDRV--GPHQQIRLDGHVVKIEAEENRICRVLMYNKPEGELCTR 86
Cdd:PRK10700    3 EKLQKVLARAGHGSRREIESIIEAGRVSVDGKIATLGDRVevTPGLKIRIDGHLISVKESAEQICRVLAYYKPEGELCTR 82
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  87 KDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVEL 166
Cdd:PRK10700   83 NDPEGRPTVFDRLPKLRGARWIAVGRLDVNTCGLLLFTTDGELANRLMHPSREVEREYAVRVFGQVDDAKLRQLSRGVQL 162
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 167 EDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQGGWEELALANVNYFRS 246
Cdd:PRK10700  163 EDGPAAFKTIKFSGGEGINQWYNVTLTEGRNREVRRLWEAVGVQVSRLIRVRYGDIPLPKGLPRGGWTELDLAQTNYLRE 242
                         250       260       270       280       290
                  ....*....|....*....|....*....|....*....|....*....|
gi 1238723754 247 SVQLPNETETKLSVMPEKRsekRAKNQRIRKAVKKH-QIRAKQVQKKRKK 295
Cdd:PRK10700  243 LVELPPETSSKVAVEKDRR---RMKANQIRRAVKRHsQVSGGRRSGGRNN 289
RsuA COG1187
Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 [Translation, ...
9-236 4.34e-105

Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 [Translation, ribosomal structure and biogenesis]; Pseudouridylate synthase RsuA, specific for 16S rRNA U516 and 23S rRNA U2605 is part of the Pathway/BioSystem: 16S rRNA modification


Pssm-ID: 440800 [Multi-domain]  Cd Length: 226  Bit Score: 305.42  E-value: 4.34e-105
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   9 EKLQKVLARAGKGSRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQIRLDGHVVKIEAEenriCRVLMYNKPEGELCTRK 87
Cdd:COG1187     3 MRLQKFLANAGVGSRREAEELIEAGRVTVNGKvVTELGTKVDPGDEVTVDGKPLKLPEE----PVYLLLNKPAGVVSTTK 78
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  88 DPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELE 167
Cdd:COG1187    79 DPEGRPTVFDLLPEARKERLFPVGRLDKDTEGLLLLTNDGELAHRLTHPKYGVEKEYLVRVDGPVTEEDLERLREGVELE 158
                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1238723754 168 DGMAKFLKITPRpGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLnPKLPQGGWEEL 236
Cdd:COG1187   159 DGPTKPAKVEIL-SGEANTWLRITLTEGRNRQVRRMFEAVGLPVVRLKRVRIGPLTL-GDLPPGEWREL 225
PseudoU_synth_RluB cd02556
Pseudouridine synthase, Escherichia coli RluB like; This group is comprised of bacterial and ...
72-236 2.23e-88

Pseudouridine synthase, Escherichia coli RluB like; This group is comprised of bacterial and eukaryotic proteins similar to E. coli RluB. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. E.coli RluB makes psi2605 in 23S RNA. psi2605 has been detected in eubacteria but, not in eukarya and archea despite the presence of a precursor U at that site.


Pssm-ID: 211330 [Multi-domain]  Cd Length: 167  Bit Score: 260.70  E-value: 2.23e-88
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  72 RVLMYNKPEGELCTRKDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGE 151
Cdd:cd02556     1 RVLIYHKPEGLICTRKDPKGRPTVFDLLPKLGIPRWISVGRLDLNTEGLLLFTNDGELANRLMHPSNEIEREYAVRVFGQ 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 152 VEATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQG 231
Cdd:cd02556    81 VTDEQLKSLKKGVELEDGFAGFKSIQLEGGEGKNSWYRVTLREGRNREVRRLWEAFGLQVSRLIRIRYGPIFLPGNLKRG 160

                  ....*
gi 1238723754 232 GWEEL 236
Cdd:cd02556   161 QWEEL 165
PseudoU_synth_RsuA_like cd02870
Pseudouridine synthases, RsuA subfamily; Pseudouridine synthases are responsible for the ...
73-219 4.08e-57

Pseudouridine synthases, RsuA subfamily; Pseudouridine synthases are responsible for the synthesis of pseudouridine from uracil in ribosomal RNA. The RsuA subfamily includes Pseudouridine Synthase similar to Ribosomal small subunit pseudouridine 516 synthase. Most of the proteins in this family are bacterial proteins.


Pssm-ID: 211347 [Multi-domain]  Cd Length: 146  Bit Score: 180.38  E-value: 4.08e-57
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 VLMYNKPEGELCTRKDPEGRPTVFDRLPRlDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEV 152
Cdd:cd02870     1 YLLLNKPRGVVSTVRDPEGRPTVLDLLKD-VGERLFPVGRLDYDTEGLLLLTNDGELANRLTHPRYGVEKTYLVKVRGVP 79
                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 1238723754 153 EATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRY 219
Cdd:cd02870    80 SEEELRRLRAGVELDDGKTAPAKVKVLSRDPKNTLLEVTLHEGRNRQVRRMFEAVGHPVLRLKRVRI 146
TIGR00093 TIGR00093
pseudouridine synthase; This model identifies panels of pseudouridine synthase enzymes that ...
110-238 7.89e-50

pseudouridine synthase; This model identifies panels of pseudouridine synthase enzymes that RNA modifications involved in maturing the protein translation apparatus. Counts per genome vary: two in Staphylococcus aureus, three in Pseudomonas putida, four in E. coli, etc. [Protein synthesis, tRNA and rRNA base modification]


Pssm-ID: 272902  Cd Length: 128  Bit Score: 161.34  E-value: 7.89e-50
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 110 VGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYN 189
Cdd:TIGR00093   1 VGRLDRDSEGLLLLTNDGELVHRLTHPGHHHEKEYLVTVEGPVTDEDLEALRKGVQLEDGKTKPAKLKVITEPGFPTWLR 80
                          90       100       110       120
                  ....*....|....*....|....*....|....*....|....*....
gi 1238723754 190 VLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNpKLPQGGWEELAL 238
Cdd:TIGR00093  81 VTLSEGRNRQVRRMFAAVGFPVLRLHRVRIGDVSLN-GLPPGEWRPLTL 128
PseudoU_synth_Rsu_Rlu_like cd02550
Pseudouridine synthase, Rsu/Rlu family; This group is comprised of eukaryotic, bacterial and ...
73-219 5.91e-45

Pseudouridine synthase, Rsu/Rlu family; This group is comprised of eukaryotic, bacterial and archeal proteins similar to eight site specific Escherichia coli pseudouridine synthases: RsuA, RluA, RluB, RluC, RluD, RluE, RluF and TruA. Pseudouridine synthases catalyze the isomerization of specific uridines in a n RNA molecule to pseudouridines (5-ribosyluracil, psi) requiring no cofactors. E. coli RluC for example makes psi955, 2504 and 2580 in 23S RNA. Some psi sites such as psi1917 in 23S RNA made by RluD are universally conserved. Other psi sites occur in a more restricted fashion, for example psi2819 in 21S mitochondrial ribosomal RNA made by S. cerevisiae Pus5p is only found in mitochondrial large subunit rRNAs from some other species and in gram negative bacteria. The E. coli counterpart of this psi residue is psi2580 in 23S rRNA. psi2604in 23S RNA made by RluF has only been detected in E.coli.


Pssm-ID: 211325 [Multi-domain]  Cd Length: 154  Bit Score: 149.45  E-value: 5.91e-45
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 VLMYNKPEGELCTRKDPEGRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEV 152
Cdd:cd02550     1 ILVLNKPSGLVCHPTDRDRDPTVVVRLDKLHGPRVHAAGRLDKDTSGLLLLTNDGRLQRRLTEPRREIEKEYLVTVRGEL 80
                          90       100       110       120       130       140       150
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 1238723754 153 -------EATTLKTLTTGVELEDGMAKFLKITPRPGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRY 219
Cdd:cd02550    81 deegiedLATVRRGRLSGLVDEGVPLAVTKVRVIGEHGGTGRLRLTLKTGRTHQIRRHCAAVGFPVLRLHRVRI 154
PseudoU_synth_RsuA cd02553
Pseudouridine synthase, Escherichia coli RsuA like; This group is comprised of eukaryotic and ...
72-236 4.18e-35

Pseudouridine synthase, Escherichia coli RsuA like; This group is comprised of eukaryotic and bacterial proteins similar to Escherichia coli RsuA. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. E.coli RsuA makes psi516 in 16S RNA. Psi at this position is not generally conserved in other organisms.


Pssm-ID: 211327 [Multi-domain]  Cd Length: 167  Bit Score: 124.55  E-value: 4.18e-35
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  72 RVLMYNKPEGELCTRKDPEGrPTVFDRLPRLDGERWI-AVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFG 150
Cdd:cd02553     1 VYLMLNKPAGVVCATKDPHH-PTVIDLLPEPDRRRDLfPVGRLDKDTTGLLLLTNDGQLAHRLTSPKKHVPKTYEVTLAG 79
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 151 EVEATTLKTLTTGVELEDGM----AKFLKITPrpgeginRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNP 226
Cdd:cd02553    80 PLTEDDIEAFAEGVLLHDGYptkpAKLEILSP-------TTVRLTITEGKYHQVKRMFAAVGNKVVALHRIRIGGLELDD 152
                         170
                  ....*....|
gi 1238723754 227 KLPQGGWEEL 236
Cdd:cd02553   153 DLAPGEWRPL 162
PseudoU_synth_RluF cd02554
Pseudouridine synthase, Escherichia coli RluF like; This group is comprised of bacterial ...
74-236 4.25e-26

Pseudouridine synthase, Escherichia coli RluF like; This group is comprised of bacterial proteins similar to Escherichia coli RluF. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. E.coli RluF makes psi2604 in 23S RNA. psi2604 has only been detected in E. coli. It is absent from other eubacteria despite a precursor U at that site and from eukarya and archea which lack a precursor U at that site.


Pssm-ID: 211328 [Multi-domain]  Cd Length: 164  Bit Score: 100.85  E-value: 4.25e-26
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  74 LMYNKPEGELCTRKDPEgRPTVFDRLPRldGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVE 153
Cdd:cd02554     3 IAYNKPVGIDCTLERAD-EDNIIDFVNP--PPRIFPIGRLDKDSEGLILLTNDGDLVNKILHADNNHEKEYLVTVNKPIT 79
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 154 ATTLKTLTTGVELEDGMAKFLKITprpgEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNpKLPQGGW 233
Cdd:cd02554    80 DEFIEGMSNGVVILGTVTKPCKVE----RLAKDKFRIVLTQGLNRQIRRMCEALGYRVTDLKRVRIMNIELG-DLAPGEW 154

                  ...
gi 1238723754 234 EEL 236
Cdd:cd02554   155 RPL 157
PRK10839 PRK10839
16S rRNA pseudouridine(516) synthase RsuA;
10-236 7.92e-26

16S rRNA pseudouridine(516) synthase RsuA;


Pssm-ID: 236774 [Multi-domain]  Cd Length: 232  Bit Score: 102.11  E-value: 7.92e-26
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  10 KLQKVLARAGKGSRREMEKVIDAGRVSIDGKVSRLGD-RVGPHQQIRLDGHVVkieaEENRICRVLMYNKPEGELCTRKD 88
Cdd:PRK10839    2 RLDKFISQQLGVSRAIAGRELRANRVTVDGEIVKNGAfKLLPEHDVAYDGNPL----AQQHGPRYFMLNKPQGYVCSTDD 77
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  89 PEgRPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELED 168
Cdd:PRK10839   78 PD-HPTVLYFLDEPVAYKLHAAGRLDIDTTGLVLMTDDGQWSHRITSPRHHCEKTYLVTLESPVADDTAEQFAKGVQLHN 156
                         170       180       190       200       210       220       230
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 1238723754 169 GM-----AKFLKITPrpgeginrwYNVLLT--EGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNPKLPQGGWEEL 236
Cdd:PRK10839  157 EKdltkpAVLEVITP---------TQVRLTisEGRYHQVKRMFAAVGNHVVELHRERIGAITLDADLAPGEYRPL 222
PseudoU_synth_RluE cd02566
Pseudouridine synthase, Escherichia coli RluE; This group is comprised of bacterial proteins ...
73-224 2.73e-25

Pseudouridine synthase, Escherichia coli RluE; This group is comprised of bacterial proteins similar to E. coli RluE. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. Escherichia coli RluE makes psi2457 in 23S RNA. psi2457 is not universally conserved.


Pssm-ID: 211334 [Multi-domain]  Cd Length: 168  Bit Score: 98.99  E-value: 2.73e-25
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 VLMYNKPEGELCT-RKDPEGRPTVFDRLPrLDGERwiAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGE 151
Cdd:cd02566     1 LILFNKPYGVLSQfTDESEKHKTLKDYID-DPGVY--AAGRLDRDSEGLLLLTDDGRLQHRITDPSFKHPKTYYVQVEGV 77
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 152 VEATTLKTLTTGVELEDGMAKFLKIT---------PR------PGEGINRWYNVLLTEGRNREVRRLWQSQGVDVSRLIR 216
Cdd:cd02566    78 PTEDALEQLRNGVELGDGLTLPAKVEkvdeppwlwEReppirfRKNIPTSWIEITICEGKNRQVRRMTAAVGFPTLRLIR 157

                  ....*...
gi 1238723754 217 VRYGDLKL 224
Cdd:cd02566   158 VSIGDIGL 165
PRK10475 PRK10475
23S rRNA pseudouridine(2604) synthase RluF;
10-295 4.83e-25

23S rRNA pseudouridine(2604) synthase RluF;


Pssm-ID: 236698 [Multi-domain]  Cd Length: 290  Bit Score: 101.35  E-value: 4.83e-25
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  10 KLQKVLARAGKGSRREMEKVIDAGRVSIDGKVSRLGDRVGPHQQIRLDGHVVKIEAEENRICRVLmyNKPEGELCTRKDP 89
Cdd:PRK10475    8 RLNKYISESGICSRREADRYIEQGNVFINGKRATIGDQVKAGDVVKVNGQLIEPREAEDLVLIAL--NKPVGIVSTTEDG 85
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  90 EgRPTVFDRLPRldGERWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELEDG 169
Cdd:PRK10475   86 E-RDNIVDFVNH--SKRVFPIGRLDKDSQGLIFLTNHGDLVNKILRAGNDHEKEYLVTVDKPITDEFIRGMGAGVPILGT 162
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 170 MAKFLKITPrpgEGINRwYNVLLTEGRNREVRRLWQSQGVDVSRLIRVRYGDLKLNpKLPQGGWEELALAN-VNYFR--- 245
Cdd:PRK10475  163 VTKKCKVKK---EAPFV-FRITLVQGLNRQIRRMCEHFGYEVTKLERTRIMNVSLS-GIPLGEWRDLTDDElIDLFKlie 237
                         250       260       270       280       290
                  ....*....|....*....|....*....|....*....|....*....|..
gi 1238723754 246 -SSVQLPNETETKLSVMPEKR-SEKRAKNQriRKAVKKHQIRAKQVQKKRKK 295
Cdd:PRK10475  238 nSSSEAKPKAKAKPKTAGIKRpVVKMEKTA--EKGGRPASNGKRFTSPGRKK 287
PRK11394 PRK11394
23S rRNA pseudouridine(2457) synthase RluE;
51-235 3.40e-19

23S rRNA pseudouridine(2457) synthase RluE;


Pssm-ID: 183115  Cd Length: 217  Bit Score: 84.02  E-value: 3.40e-19
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  51 HQQIRLDGHVVKIEAEENRICRVLMYNKPEGELCTRKDPEGRPTVFDRLPRldgERWIAVGRLDVNTSGLLLFTNDGELA 130
Cdd:PRK11394   19 HQVKRFSSQRSTRRKPENQPTRVILFNKPYDVLPQFTDEAGRKTLKEFIPV---QGVYAAGRLDRDSEGLLVLTNNGALQ 95
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 131 NRLMRPSYEIEREYAVRVFGEVEATTLKTLTTGVELEDG--MAKFLKITPRPGEGINR-------------WYNVLLTEG 195
Cdd:PRK11394   96 ARLTQPGKRTGKIYYVQVEGIPTQDALEALRNGVTLNDGptLPAGAELVDEPAWLWPRnppirerksiptsWLKITLYEG 175
                         170       180       190       200
                  ....*....|....*....|....*....|....*....|
gi 1238723754 196 RNREVRRLWQSQGVDVSRLIRVRYGDLKLNpKLPQGGWEE 235
Cdd:PRK11394  176 RNRQVRRMTAHVGFPTLRLIRYAMGDYSLD-NLANGEWRE 214
PseudoU_synth_2 pfam00849
RNA pseudouridylate synthase; Members of this family are involved in modifying bases in RNA ...
73-202 1.20e-18

RNA pseudouridylate synthase; Members of this family are involved in modifying bases in RNA molecules. They carry out the conversion of uracil bases to pseudouridine. This family includes RluD, a pseudouridylate synthase that converts specific uracils to pseudouridine in 23S rRNA. RluA from E. coli converts bases in both rRNA and tRNA.


Pssm-ID: 459961 [Multi-domain]  Cd Length: 151  Bit Score: 80.53  E-value: 1.20e-18
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 VLMYNKPEGELCTRKDPEG---RPTVFDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMR--PSYEIEREYAVR 147
Cdd:pfam00849   1 YIVVNKPAGVPVHPTDSLTkllSLLALLLRRELGVKRLYPVHRLDKNTSGLLLLAKDGEAANKLNKlfPERKIEKEYLAL 80
                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1238723754 148 VFGEVEatTLKTLTTGVELEDGMAKF--------------LKITPRPGEGINRWYNVLLTEGRNREVRR 202
Cdd:pfam00849  81 VDKPEE--EEGTIKSPIKKEKNKSPFrkeeelggkkavthLKVLKSGSKGDYSLLELELVTGRKHQIRA 147
PSSA_1 cd02555
Pseudouridine synthase, a subgroup of the RsuA family; This group is comprised of bacterial ...
74-239 1.69e-15

Pseudouridine synthase, a subgroup of the RsuA family; This group is comprised of bacterial proteins assigned to the RsuA family of pseudouridine synthases. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). No cofactors are required. The TruA family is comprised of proteins related to Escherichia coli RsuA.


Pssm-ID: 211329 [Multi-domain]  Cd Length: 177  Bit Score: 72.82  E-value: 1.69e-15
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  74 LMYNKPEGELCTRKDP---EGRPTVFDRLPR--LDGE--RWIAVGRLDVNTSGLLLFTNDGELANRLMRPSYEIEREYAV 146
Cdd:cd02555     7 LLLHKPAGMVSEQALAllgPGQRSAADRSGRrpLKGHfaRLAPIGPLDKDASGLLVFSQDGRVLRKLIGDASRLEQEYLV 86
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754 147 RVFGEVEATTLKTLTTGVELEDGMAKFLKITprpgeginrWYN-----VLLTEGRNREVRRLWQSQGVDVSRLIRVRYGD 221
Cdd:cd02555    87 EVRGELTAGGLERLNHGLTYDGRELPPAKVS---------WQNeqrlrFALKEPQPGQIRRMCESVGLEVVALRRIRIGR 157
                         170
                  ....*....|....*...
gi 1238723754 222 LKLNpKLPQGGWEELALA 239
Cdd:cd02555   158 VSLG-KLPLGQWRYLTTG 174
S4 cd00165
S4/Hsp/ tRNA synthetase RNA-binding domain; The domain surface is populated by conserved, ...
11-73 2.69e-05

S4/Hsp/ tRNA synthetase RNA-binding domain; The domain surface is populated by conserved, charged residues that define a likely RNA-binding site; Found in stress proteins, ribosomal proteins and tRNA synthetases; This may imply a hitherto unrecognized functional similarity between these three protein classes.


Pssm-ID: 238095 [Multi-domain]  Cd Length: 70  Bit Score: 41.47  E-value: 2.69e-05
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 1238723754  11 LQKVLARAGK-GSRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQIRLDGH--VVKIEAEENRICRV 73
Cdd:cd00165     3 LDKILARLGLaPSRSEARQLIKHGHVLVNGKvVTKPSYKVKPGDVIEVDGKsiEEDIVYEDKKLLVV 69
S4 pfam01479
S4 domain; The S4 domain is a small domain consisting of 60-65 amino acid residues that was ...
9-54 4.98e-05

S4 domain; The S4 domain is a small domain consisting of 60-65 amino acid residues that was detected in the bacterial ribosomal protein S4, eukaryotic ribosomal S9, two families of pseudouridine synthases, a novel family of predicted RNA methylases, a yeast protein containing a pseudouridine synthetase and a deaminase domain, bacterial tyrosyl-tRNA synthetases, and a number of uncharacterized, small proteins that may be involved in translation regulation. The S4 domain probably mediates binding to RNA.


Pssm-ID: 396182 [Multi-domain]  Cd Length: 48  Bit Score: 40.17  E-value: 4.98e-05
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....*...
gi 1238723754   9 EKLQKVLARAGKG-SRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQI 54
Cdd:pfam01479   1 RRLDKVLARLGLAsSRSQARQLIEHGRVLVNGKvVKDPSYRVKPGDEI 48
S4 smart00363
S4 RNA-binding domain;
11-63 4.18e-04

S4 RNA-binding domain;


Pssm-ID: 214638 [Multi-domain]  Cd Length: 60  Bit Score: 37.96  E-value: 4.18e-04
                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*
gi 1238723754   11 LQKVLARAG-KGSRREMEKVIDAGRVSIDGK-VSRLGDRVGPHQQIRLDGHVVKI 63
Cdd:smart00363   3 LDKFLARLGlAPSRSQARRLIEQGRVKVNGKkVTKPSYIVKPGDVISVRGKELKR 57
PseudoU_synth_RluA_like cd02869
Pseudouridine synthase, RluA family; This group is comprised of eukaryotic, bacterial and ...
77-187 9.34e-04

Pseudouridine synthase, RluA family; This group is comprised of eukaryotic, bacterial and archeal proteins similar to eight site specific Escherichia coli pseudouridine synthases: RsuA, RluA, RluB, RluC, RluD, RluE, RluF and TruA. Pseudouridine synthases catalyze the isomerization of specific uridines in a n RNA molecule to pseudouridines (5-ribosyluracil, psi) requiring no cofactors. E. coli RluC for example makes psi955, 2504 and 2580 in 23S RNA. Some psi sites such as psi1917 in 23S RNA made by RluD are universally conserved. Other psi sites occur in a more restricted fashion, for example psi2819 in 21S mitochondrial ribosomal RNA made by S. cerevisiae Pus5p is only found in mitochondrial large subunit rRNAs from some other species and in gram negative bacteria. The E. coli counterpart of this psi residue is psi2580 in 23S rRNA. psi2604in 23S RNA made by RluF has only been detected in E.coli.


Pssm-ID: 211346 [Multi-domain]  Cd Length: 185  Bit Score: 39.24  E-value: 9.34e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  77 NKPEGELCTRKDPEGRPTV-----FDRLPRLDGERWIAVGRLDVNTSGLLLFTNDGELANRLMR--PSYEIEREYAVRVF 149
Cdd:cd02869     5 NKPAGLPVHPGPGHLTGTLvnallKLLLLLGEEFRPGLVHRLDKDTSGLLLVAKNKKAAAKLSKqfKERKVKKTYLALVD 84
                          90       100       110
                  ....*....|....*....|....*....|....*...
gi 1238723754 150 GEVEATTLKTLTTGVELEDGMAKFLKITPRPGEGINRW 187
Cdd:cd02869    85 GKPPEDEGTIDAPLGRKKRKKRARVVVSEDGKPAITHY 122
PseudoU_synth_ScRIB2 cd02557
Pseudouridine synthases similar to Saccharomyces cerevisiae RIB2; Pseudouridine synthase, ...
112-151 1.54e-03

Pseudouridine synthases similar to Saccharomyces cerevisiae RIB2; Pseudouridine synthase, Saccharomyces cerevisiae RIB2_like. This group is comprised of eukaryotic and bacterial proteins similar to Saccharomyces cerevisiae RIB2, S. cerevisiae Pus6p and human hRPUDSD2. S. cerevisiae RIB2 displays two distinct catalytic activities. The N-terminal domain of RIB2 is RNA:psi-synthase which makes psi32 on cytoplasmic tRNAs. Psi32 is highly phylogenetically conserved. The C-terminal domain of RIB2 has a DRAP deaminase activity which catalyses the formation of 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate from 2,5-diamino-6-ribitylamino-4(3H)-pyrimidinone 5'-phosphate during riboflavin biosynthesis. S. cerevisiae Pus6p makes the psi31 of cytoplasmic and mitochondrial tRNAs.


Pssm-ID: 211331 [Multi-domain]  Cd Length: 213  Bit Score: 39.15  E-value: 1.54e-03
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|...
gi 1238723754 112 RLDVNTSGLLLFTNDGELANRL---MRpSYEIEREYAVRVFGE 151
Cdd:cd02557    65 RLDRLTSGLLLFAKTSQTASRLqqqIR-SREVKKEYLARVKGE 106
rluA_subfam TIGR00005
pseudouridine synthase, RluA family; In E. coli, RluD (SfhB) modifies uridine to pseudouridine ...
8-151 2.87e-03

pseudouridine synthase, RluA family; In E. coli, RluD (SfhB) modifies uridine to pseudouridine at 23S RNA U1911, 1915, and 1917, RluC modifies 955, 2504 and 2580, and RluA modifies U746 and tRNA U32. An additional homolog from E. coli outside this family, TruC (SP|Q46918), modifies uracil-65 in transfer RNAs to pseudouridine. [Protein synthesis, tRNA and rRNA base modification]


Pssm-ID: 161659 [Multi-domain]  Cd Length: 299  Bit Score: 38.46  E-value: 2.87e-03
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754   8 DEKLQKVLARAGKGSRREM-EKVIDAGRVSIDGKVS-------RLGDRVG-------PHQQIRLDGhVVKIEAEENRIcr 72
Cdd:TIGR00005   5 GQRLDDFLASLLPDLSRSRiQKLIENGQVKVNGKVTanpklkvKDGDRITvrvpeeeEHEVPPQDI-PLDILFEDEDI-- 81
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1238723754  73 vLMYNKPEGELCtrkDPEGR---PTVFDRL-----PRLDGERWIAVGRLDVNTSGLLLF--TNDG--ELANRLMRpsYEI 140
Cdd:TIGR00005  82 -IVINKPSGLVV---HPGGGnpfGTVLNALlahcpPIAGVERVGIVHRLDRDTSGLMVVakTPLAlrELQRQLKN--RTV 155
                         170
                  ....*....|.
gi 1238723754 141 EREYAVRVFGE 151
Cdd:TIGR00005 156 TKEYVALVHGQ 166
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
Help | Disclaimer | Write to the Help Desk
NCBI | NLM | NIH