ubiquitin-like (Ubl) domain found in BCL2-associated athanogene 6 (BAG6) and similar proteins; BAG6, also termed large proline-rich protein BAG6, or BAG family molecular chaperone regulator 6, or HLA-B-associated transcript 3 (Bat3), or protein Scythe, or protein G3, is a nucleo-cytoplasmic shuttling chaperone protein that is highly conserved in eukaryotes. It functions in two distinct biological pathways, ubiquitin-mediated protein degradation of defective polypeptides and tail-anchored transmembrane protein biogenesis in mammals. BAG6 is a component of the heterotrimeric BAG6 sortase complex composed of BAG6, transmembrane recognition complex 35 (TRC35) and ubiquitin-like protein 4A (UBL4A). The BAG6 complex together with the cochaperone small, glutamine-rich, tetratricopeptide repeat-containing, protein alpha (SGTA) plays a role in the biogenesis of tail-anchored membrane proteins and subsequently shown to regulate the ubiquitination and proteasomal degradation of mislocalized proteins. Moreover, BAG6 acts as an apoptotic regulator that binds reaper, a potent apoptotic inducer. BAG6/reaper is thought to signal apoptosis, in part through regulating the folding and activity of apoptotic signaling molecules. It is also likely a key regulator of the molecular chaperone Heat Shock Protein A2 (HSPA2) stability/function in human germ cells. Furthermore, aspartyl protease-mediated cleavage of BAG6 is necessary for autophagy and fungal resistance in plants. BAG6 contains a ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, which provides a platform for discriminating substrates with shorter hydrophobicity stretches as a signal for defective proteins.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVeDGHTLHLVVR 120
Cdd:cd01809     1 LEVTVKTLDSQNRTFTVPEEITVKEFKEHIASSVNIPAEKQRLIFQGRVLQDDKKLKEYDV-DGKVIHLVER 71

Ubiquitin [Posttranslational modification, protein turnover, chaperones];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVRHPDLpppg 128
Cdd:COG5272     1 MQIFVKTLTGKTITLEVEPNDTIEAVKAKIQDKEGIPPDQQRLIFAGKQLEDDRTLADYNIQKESTLHLVTRTLGI---- 76

                          90       100       110
                  ....*....|....*....|....*....|..
gi 2179037928 129 slpnhSVTEPNSSTSHGHSTQVAPGVFIETFN 160
Cdd:COG5272    77 -----SEIELSNLKLDLDPNPSHLFIFILGLI 103

UV excision repair protein Rad23; All proteins in this family for which functions are known are components of a multiprotein complex used for targeting nucleotide excision repair to specific parts of the genome. In humans, Rad23 complexes with the XPC protein. This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University). [DNA metabolism, DNA replication, recombination, and repair]

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLS---EQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVRHPDLP 125
Cdd:TIGR00601   1 MTLTFKTLQQQKFKIDMEPDETVKELKEKIEAEQGKDAypvAQQKLIYSGKILSDDKTVKEYKIKEKDFVVVMVSKPKTG 80

                          90       100
                  ....*....|....*....|....*..
gi 2179037928 126 PPGSLPNHSvtEPNSSTSHGHSTQVAP 152
Cdd:TIGR00601  81 TGKVAPPAA--TPTSAPTPTPSPPASP 105

ubiquitin-like (Ubl) domain found in BCL2-associated athanogene 6 (BAG6) and similar proteins; BAG6, also termed large proline-rich protein BAG6, or BAG family molecular chaperone regulator 6, or HLA-B-associated transcript 3 (Bat3), or protein Scythe, or protein G3, is a nucleo-cytoplasmic shuttling chaperone protein that is highly conserved in eukaryotes. It functions in two distinct biological pathways, ubiquitin-mediated protein degradation of defective polypeptides and tail-anchored transmembrane protein biogenesis in mammals. BAG6 is a component of the heterotrimeric BAG6 sortase complex composed of BAG6, transmembrane recognition complex 35 (TRC35) and ubiquitin-like protein 4A (UBL4A). The BAG6 complex together with the cochaperone small, glutamine-rich, tetratricopeptide repeat-containing, protein alpha (SGTA) plays a role in the biogenesis of tail-anchored membrane proteins and subsequently shown to regulate the ubiquitination and proteasomal degradation of mislocalized proteins. Moreover, BAG6 acts as an apoptotic regulator that binds reaper, a potent apoptotic inducer. BAG6/reaper is thought to signal apoptosis, in part through regulating the folding and activity of apoptotic signaling molecules. It is also likely a key regulator of the molecular chaperone Heat Shock Protein A2 (HSPA2) stability/function in human germ cells. Furthermore, aspartyl protease-mediated cleavage of BAG6 is necessary for autophagy and fungal resistance in plants. BAG6 contains a ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, which provides a platform for discriminating substrates with shorter hydrophobicity stretches as a signal for defective proteins.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVeDGHTLHLVVR 120
Cdd:cd01809     1 LEVTVKTLDSQNRTFTVPEEITVKEFKEHIASSVNIPAEKQRLIFQGRVLQDDKKLKEYDV-DGKVIHLVER 71

ubiquitin-like (Ubl) domain found in ubiquitin and ubiquitin-like Ubl proteins; Ubiquitin-like (Ubl) proteins have a similar ubiquitin (Ub) beta-grasp fold and attach to other proteins in a Ubl manner but with biochemically distinct roles. Ub and Ubl proteins conjugate and deconjugate via ligases and peptidases to covalently modify target polypeptides. Some Ubl domains have adaptor roles in Ub-signaling by mediating protein-protein interaction. Prokaryotic sulfur carrier proteins are Ub-related proteins that can be activated in an ATP-dependent manner. Polyubiquitination signals for a diverse set of cellular events via different isopeptide linkages formed between the C terminus of one ubiquitin (Ub) and the epsilon-amine of K6, K11, K27, K29, K33, K48, or K63 of a second Ub. One of these seven lysine residues (K27, Ub numbering) is conserved in this Ubl_ubiquitin_like family. K27-linked Ub chains are versatile and can be recognized by several downstream receptor proteins. K27 has roles beyond chain linkage, such as in Ubl NEDD8 (which contains many of the same lysines (K6, K11, K27, K33, K48) as Ub) where K27 has a role (other than conjugation) in the mechanism of protein neddylation.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 2179037928  51 IKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLV 118
Cdd:cd17039     1 ITVKTLDGKTYTVEVDPDDTVADLKEKIEEKTGIPVEQQRLIYNGKELKDDKTLSDYGIKDGSTIHLV 68

Ubiquitin [Posttranslational modification, protein turnover, chaperones];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVRHPDLpppg 128
Cdd:COG5272     1 MQIFVKTLTGKTITLEVEPNDTIEAVKAKIQDKEGIPPDQQRLIFAGKQLEDDRTLADYNIQKESTLHLVTRTLGI---- 76

                          90       100       110
                  ....*....|....*....|....*....|..
gi 2179037928 129 slpnhSVTEPNSSTSHGHSTQVAPGVFIETFN 160
Cdd:COG5272    77 -----SEIELSNLKLDLDPNPSHLFIFILGLI 103

ubiquitin-like (Ubl) domain found in the Rad23 protein family; The Rad23 family includes the yeast nucleotide excision repair (NER) proteins, Rad23p (in Saccharomyces cerevisiae) and Rhp23p (in Schizosaccharomyces pombe), their mammalian orthologs HR23A and HR23B, and putative DNA repair proteins from plants. Rad23 proteins play dual roles in DNA repair as well as in proteosomal degradation. They have affinity for both the proteasome and ubiquitinylated proteins and participate in translocating polyubiquitinated proteins to the proteasome. Rad23 proteins carry an ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, and two ubiquitin-associated (UBA) domains, as well as a xeroderma pigmentosum group C (XPC) protein-binding domain. The Ubl domain is responsible for the binding to proteasome. The UBA domains are important for binding of ubiquitin (Ub) or multi-ubiquitinated substrates, which suggests Rad23 proteins might be involved in certain pathways of Ub metabolism. Both the Ubl domain and the XPC-binding domain are necessary for efficient NER function of Rad23 proteins.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2179037928  51 IKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVL-SEQQRLICQGKVLKDDQLLSAYHVED 111
Cdd:cd01805     3 ITFKTLQQQTFEIEVEPSDTVLELKEKIEQEQGDFpASGQKLIYSGKVLKDDKTLSEYNIKE 64

ubiquitin-like (Ubl) domain found in ubiquitin-like proteins UBL4A and similar proteins; UBL4A, also termed GdX, is a ubiquitously expressed ubiquitin-like (Ubl) protein that forms a complex with partner proteins and participates in the protein processing through endoplasmic reticulum (ER), acting as a chaperone. As a key component of the BCL2-associated athanogene 6 (BAG6) chaperone complex, UBL4A plays a role in mediating DNA damage signaling and cell death. UBL4A also regulates insulin-induced Akt plasma membrane translocation through promotion of Arp2/3-dependent actin branching. Moreover, UBL4A specifically stabilizes the TC45/STAT3 association and promotes dephosphorylation of STAT3 to repress tumorigenesis. UBL4B is testis-specific, and encoded by an X-derived retrogene Ubl4b, which is specifically expressed in post-meiotic germ cells in mammals. As a germ cell-specific cytoplasmic protein, UBL4B is not present in somatic cells. Moreover, UBL4B is present in elongated spermatids, but not in spermatocytes and round spermatids, suggesting its function is restricted to late spermiogenesis. The function of UBL4A may be compensated by either UBL4B or other Ubl proteins in normal conditions. Both UBL4A and UBL4B contain a conserved Ubl domain with a beta-grasp Ubl fold, a common structure involved in protein-protein interactions.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2179037928  51 IKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVR 120
Cdd:cd01807     3 ITVKILQGKECTIEVSPTESVLTVKQLVAEQLNVPVSQQRLVFKGKTLADEHSLSDYSIGPGSKIHLVVK 72

ubiquitin-like (Ubl) domain 1 found in interferon-stimulated gene 15 (ISG15) and similar proteins; ISG15, also termed interferon-induced 15 kDa protein, or interferon-induced 17 kDa protein (IP17), or ubiquitin cross-reactive protein (UCRP), is an antiviral interferon-induced ubiquitin-like protein (Ubl) that upon viral infection, modifies cellular and viral proteins by mechanisms similar to ubiquitination. Although ISG15 has properties similar to those of other Ubl molecules, it is a unique member of the Ubl superfamily, whose expression and conjugation to target proteins are tightly regulated by specific signaling pathways, indicating it may have specialized functions in the immune system. ISG15 contains two tandem Ubl domains with a beta-grasp Ubl fold. This family corresponds to the first Ubl domain.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 2179037928  50 EIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQ--GKVLKDDQLLSAYHVEDGHTLHLVVR 120
Cdd:cd01792     2 DLTVKMLTGNEFQVSVSPSMTVSELKAQITQKIGVPAFQQRLAVQpsGVELQDGVRLASQGLGPSSTVLLVVK 74

ubiquitin-like (Ubl) domain found in Arabidopsis thaliana ubiquitin-protein ligase 5 (AtUPL5) and similar proteins; Arabidopsis thaliana AtUPL5, also termed HECT-type E3 ubiquitin transferase UPL5, is an E3 ubiquitin-protein ligase that contains a ubiquitin-like domain (Ubl), a C-type lectin-binding domain, a leucine zipper and a HECT domain. HECT domain containing-ubiquitin-protein ligases have more than one member in different genomes, these proteins have been classified into four sub-families (UPL1/2, UPL3/4, UPL5 and UPL6/7). AtUPL5 fUPL5 regulates leaf senescence in Arabidopsis through degradation of the transcription factor WRKY53.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 2179037928  50 EIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLV 118
Cdd:cd16107     1 QIFVRTYCGKTIVLHAKASDTVESLHQQIEARTGIPSLEQRLIFGGRQLQHSQSLESCKMENDATLFLV 69

ubiquitin-like (Ubl) domain 2 found in interferon-stimulated gene 15 (ISG15) and similar proteins; ISG15, also termed interferon-induced 15 kDa protein, or interferon-induced 17 kDa protein (IP17), or ubiquitin cross-reactive protein (UCRP), is an antiviral interferon-induced ubiquitin-like protein that upon viral infection it modifies cellular and viral proteins by mechanisms similar to ubiquitination. Although ISG15 has properties similar to those of other ubiquitin-like (Ubl) molecules, it is a unique member of the Ubl superfamily, whose expression and conjugation to target proteins are tightly regulated by specific signaling pathways, indicating it may have specialized functions in the immune system. ISG15 contains two tandem Ubl domains with a beta-grasp Ubl fold. This family corresponds to the second Ubl domain.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2179037928  49 IEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVR 120
Cdd:cd01810     1 LSIFVRNEKGQSHTYEVRLTQTVDQLKQKVSGREGVHDDQFWLTFEGRPLEDQLPLGEYGLKPQSTIHMNLR 72

ubiquitin-like (Ubl) domain found in BAG family molecular chaperone regulator 1 (BAG1) and similar proteins; BAG1, also termed Bcl-2-associated athanogene 1, or HAP, is a multifunctional protein involved in a variety of cellular functions such as apoptosis, transcription, and proliferative pathways, as well as in cell signaling and differentiation. It delivers chaperone-recognized unfolded substrates to the proteasome for degradation. BAG1 functions as a co-chaperone for Hsp70/Hsc70 to increase Hsp70 foldase activity. It also suppresses apoptosis and enhances neuronal differentiation. As an anti-apoptotic factor, BAG1 interacts with tau and regulates its proteasomal degradation. It also binds to BCR-ABL with a high affinity, and directly routes immature BCR-ABL for proteasomal degradation. It acts as a potential therapeutic target in Parkinson's disease. It also modulates huntingtin toxicity, aggregation, degradation, and subcellular distribution, suggesting a role in Huntington's disease. There are at least four isoforms of Bag1 protein that are formed by alternative initiation of translation within a common mRNA. BAG1 contains an N-terminal ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, and a C-terminal BAG domain.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 2179037928  57 DSQTYTLKV-DKQMPVPA---LKEQIASVTGVLSEQQRLICQGKVLKD-DQLLSAYHVEDG 112
Cdd:cd01812     8 GSNKHTIELpSQDEDEPTlqdLAEAIEEVTGVPVENQKLIFKGKSLKDpEQPLSALGVKNG 68

ubiquitin-like (Ubl) domain 2 found in 2'-5'-oligoadenylate synthase-like protein (OASL) and similar proteins; OASL, also termed 2'-5'-OAS-related protein (2'-5'-OAS-RP), or 59 kDa 2'-5'-oligoadenylate synthase-like protein, or thyroid receptor-interacting protein 14, or TR-interacting protein 14 (TRIP-14), or p59 OASL (p59OASL), is an interferon (IFN)-induced antiviral protein that plays an important role in the IFNs-mediated antiviral signaling pathway. It inhibits respiratory syncytial virus replication and is targeted by the viral nonstructural protein 1 (NS1). It also displays antiviral activity against encephalomyocarditis virus (EMCV) and hepatitis C virus (HCV) via an alternative antiviral pathway independent of RNase L. Moreover, OASL does not have 2'-5'-OAS activity, but can bind double-stranded RNA (dsRNA) to enhance RIG-I signaling. OASL belongs to the 2'-5' oligoadenylate synthase (OAS) family. While each member of this family has a conserved N-terminal OAS catalytic domain, only OASL has two tandem C-terminal ubiquitin-like (Ubl) repeats, which are required for its antiviral activity. This family corresponds to the second Ubl domain.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2179037928  48 TIEIKIKTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHL 117
Cdd:cd16103     1 EIQIFVKFPDGTSKPYAINPEDTILDLKEKIEEQGGPPVEDQILLFQGQELRDKKSLKYYGIKDGDTLQL 70

ubiquitin-like (Ubl) domain found in transmembrane and ubiquitin-like domain-containing proteins TMUB1, TMUB2, and similar proteins; TMUB1, also termed dendritic cell-derived ubiquitin-like protein (DULP), or hepatocyte odd protein shuttling protein, or ubiquitin-like protein SB144, or HOPS, is highly expressed in the nervous system. It is involved in the termination of liver regeneration and plays a negative role in interleukin-6-induced hepatocyte proliferation. The overexpression of Tmub1 has been shown to play a role in the inhibition of cell proliferation. TMUB1 has been implicated in the regulation of locomotor activity and wakefulness in mice, perhaps acting through its interaction with CAMLG. It also facilitates the recycling of AMPA receptors into synaptic membrane in cultured primary neurons. TMUB1 contains transmembrane domains and a ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold. TMUB2 is an uncharacterized transmembrane domain and Ubl domain-containing protein that shows high sequence similarity to TMUB1.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 2179037928  48 TIEIKIKTLDSQTYTLKVDKQMPVPALKEQIASvtGVLSEQQ--RLICQGKVLKDD-QLLSAYHVEDGHTLHLVVR 120
Cdd:cd17057     1 TITIRLKFLNETERVVYARPEDTVGDFKRRHFP--DELAQGKrvRLIYQGQLLRDDsRTLSSYGIQDGSVIHCHIS 74

ubiquitin-like (Ubl) domain found in heme-oxidized IRP2 ubiquitin ligase 1 (HOIL-1) and similar proteins; HOIL-1, also termed RBCK1, or HOIL-1L, or RanBP-type and C3HC4-type zinc finger-containing protein 1, HBV-associated factor 4, or Hepatitis B virus X-associated protein 4, or RING finger protein 54 (RNF54), or ubiquitin-conjugating enzyme 7-interacting protein 3, or UbcM4-interacting protein 28 (UIP28), together with E3 ubiquitin-protein ligase RNF31 (also known as HOIP) and SHANK-associated RH domain interacting protein (SHARPIN), forms the E3-ligase complex (also known as linear-ubiquitin-chain assembly complex LUBAC) that regulates NF-kappaB activity and apoptosis through conjugation of linear polyubiquitin chains to NF-kappaB essential modulator (also known as NEMO or IKBKG). HOIL-1 plays a crucial role in TNF-alpha-mediated NF-kappaB activation. It also functions as an ubiquitin-protein ligase E3 that interacts with not only PKCbeta but also PKCzeta. It can recognize heme-oxidized IRP2 (iron regulatory protein2) and is thought to affect the turnover of oxidatively damaged proteins. HOIL-1 contains an N-terminal ubiqutin-like (UBL) domain and an Npl4 zinc-finger (NZF) domain, which regulate the interaction with the LUBAC subunit RNF31 and ubiquitin, respectively. The NZF domain belongs to RanBP2-type zinc finger (zf-RanBP2) domain superfamily. In addition, HOIL-1 has a RBR domain that was previously known as RING-BetweenRING-RING domain or TRIAD [two RING fingers and a DRIL (double RING finger linked)] domain. Based on current understanding of the structural biology of RBR ligases, the nomenclature of RBR has been corrected as RING-BRcat (benign-catalytic)-Rcat (required-for-catalysis) recently. The RBR (RING1-BRcat-Rcat) domain use an auto-inhibitory mechanism to modulate ubiquitination activity, as well as a hybrid mechanism that combines aspects from both RING and HECT E3 ligase function to facilitate the ubiquitination reaction.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 2179037928  47 TTIEIKI----KTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHV-EDGHT--LHLV 118
Cdd:cd01799     1 TEISIKVyvedKSSSSGPITLKVRPHTTIASLKRQIFLEYGFPPSVQRWIIGKRLATDDETLLSYGIkDSGDPafLYLV 79

Ubiquitin-like domain; This entry contains ubiquitin-like domains.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 2179037928  64 KVDKQMPVPALKEQIASVTGVLSEQQRL---------ICqgKVLKDDQLLSAYHVEDGHTLHLV 118
Cdd:pfam14560  18 RFDKSLTIEELKEKLELITGTPPSSMRLqlyddddnlVA--KLDDDDALLGSYGVRDGMRIHVI 79

ubiquitin-like (Ubl) domain found in splicing factor 3A 120kDa subunit (SF3a120) and similar proteins; Mammalian splicing factor SF3a consists of three subunits of 60, 66, and 120 kDa and functions early during pre-mRNA splicing by converting the U2 snRNP to its active form. The 120kDa subunit SF3a120, also termed splicing factor 3A subunit 1 (SF3A1), or spliceosome-associated protein 114 (SAP114), is the U2 snRNP-specific protein that is critical for spliceosome assembly and normal splicing events. During splicing, SF3a120, together with the U2 snRNP and other proteins, are recruited to the 3' splicing site to generate the splicing complex A after the recognition of the 3' splicing site. SF3a120 contains two N-terminal SWAP (suppressor-of-white-apricot) domains, referred to collectively as the SURP module, as well as a C-terminal ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, a common structure involved in protein-protein interactions.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 2179037928  56 LDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRL-ICQGKVLKDDQLLSAYHVEDGHTLHLVVR 120
Cdd:cd01800    19 LNGQVLELTLPLTDTISVLKEKIHEELGMPANKQKLqVEGGGFLKDSNSLAFYNLGSGTVLTLSLK 84

ubiquitin-like (Ubl) domain found in ubiquitin-like domain-containing CTD phosphatase 1 (UBLCP1) and similar proteins; UBLCP1 is a 26S proteasome phosphatase that regulates nuclear proteasome activity. It is localized in the nucleus and it contains conserved ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, which directly interacts with the proteasome. Knockdown of UBLCP1 in cells promotes 26S proteasome assembly and selectively enhances nuclear proteasome activity. UBLCP1 may also play a role in the regulation of phosphorylation state of RNA polymerase II C-terminal domain, a key event during mRNA metabolism.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 2179037928  49 IEIKIKtLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLI---CQGKVLKDDQLLSAYHVEDGHTLHLV 118
Cdd:cd01813     1 ITLIVK-WSGKEYPVTVLSSDTVLDLKQRIFELTGVLPKRQKLLglkVKGKPADDDVKLSSLKLKPNTKIMMM 72

ubiquitin-like (Ubl) domain 1 found in leukocyte antigen F (HLA-F) adjacent transcript 10 (FAT10) and similar proteins; FAT10, also termed ubiquitin D (UBD), or diubiquitin, is a cytokine-inducible ubiquitin-like (Ubl) modifer that is highly expressed in the thymus, and targets substrates covalently for 26S proteasomal degradation. It is also associated with cancer development, antigen processing and antimicrobial defense, chromosomal stability and cell cycle regulation. FAT10 is presented on immune cells and under the inflammatory conditions, is synergistically induced by interferon gamma (IFNgamma) and tumor necrosis factor (TNFalpha) in the non-immune (liver parenchymal) cells. FAT10 contains two Ubl domains. The family corresponds to the first Ubl domain of FAT10. Some family members contain only one Ubl domain.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2179037928  59 QTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSAYHVEDGHTLHLVVR 120
Cdd:cd17052    10 DLMTFDANPQDSVKKINEHVRSKTKVPVQDQVLLLGSKILKPRRRLSSYGIDKEKTIHLTLK 71

ubiquitin-like (Ubl) domain found in ubiquitin-specific-processing protease 48 (USP48) and similar proteins; USP48, also termed USP31, or deubiquitinating enzyme 48, or ubiquitin thioesterase 48, or ubiquitin carboxyl-terminal hydrolase 48, belongs to the ubiquitin specific protease (USP) family that is one of at least seven deubiquitylating enzyme (DUB) families capable of deconjugating ubiquitin (Ub)and ubiquitin-like (Ubl) adducts. While the USP proteins have a conserved catalytic core domain, USP48 differs in its domain architecture. It contains an N-terminal USP domain, three DUSP (domain present in ubiquitin-specific protease) domains, and a C-terminal Ubl domain with a beta-grasp Ubl fold, a common structure involved in protein-protein interactions. USP48 is a deubiquitinating enzyme that interacts with TNF receptor-associated factor 2 (TRAF2) and has been implicated in activation of nuclear factor-kappaB (NF-kappaB). Moreover, as a nuclear deubiquitinase regulated by casein kinase 2 (CK2), USP48 controls the ubiquitin/proteasome-system (UPS)-dependent turnover of activated NF-kappaB/RelA in the nucleus together with the COP9 signalosome, suggesting a role of USP48 in a timely control of immune responses.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 2179037928  63 LKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDD-QLLSAYHVEDGHTLHLVV 119
Cdd:cd01795    10 LTVSSTTTLKELKLQIMEKFSVAPFDQHLYFNGRELTDDsATLADLGILPGDVLYLKV 67

ubiquitin-like (Ubl) domain found in NEDD8 ultimate buster 1 (NUB1) and similar proteins; NUB1, also termed negative regulator of ubiquitin-like proteins 1, or renal carcinoma antigen NY-REN-18, or protein BS4, is a NEDD8-interacting protein that can be induced by interferon. It functions as a strong post-transcriptional down-regulator of the NEDD8 expression and plays critical roles in regulating many biological events, such as cell growth, NF-kappaB signaling, and biological responses to hypoxia. NUB1 can also interact with aryl hydrocarbon receptor-interacting protein-like 1 (AIPL1), which may function in the regulation of cell cycle progression. NUB1 contains a conserved ubiquitin-like (Ubl) domain with a beta-grasp Ubl fold, three ubiquitin-associated domains (UBA), a bipartite nuclear localization signal (NLS) and a PEST motif.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 2179037928  48 TIEIKI--KTLDSQTYTLKVDKQMPVPALKEQIASVTGVLSEQQRLICQGKVLKDDQLLSA 106
Cdd:cd17062     4 TLRVRLpgQGSKKKKITLETSLDITGSELREKIAEELGVPEDRIKLISNGKVLKDEKTLAE 64

ubiquitin-like (Ubl) domain found in tubulin-folding cofactor B (TBCB) and similar proteins; TBCB, also termed cytoskeleton-associated protein 1, or cytoskeleton-associated protein CKAPI, or tubulin-specific chaperone B, is one of protein cofactors A through E that is required for the folding of tubulins prior to their incorporation into microtubules and heterodimer assembly. TBCB comprises an N-terminal ubiquitin-like (Ubl) domain and a C-terminal cytoskeleton-associated protein with glycine-rich segment (CAP-Gly) domain. The Ubl domain of TBCB is essential for proper folding and assembly of tubulin alpha. It has a beta-grasp Ubl fold, a common structure involved in protein-protein interactions. Ubiquitin (Ub) is a protein modifier in eukaryotes that is involved in various cellular processes, including transcriptional regulation, cell cycle control, and DNA repair. TBC-A through E are necessary for the biogenesis of microtubules and for cell viability.

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gi 2179037928  64 KVDKQMPVPALKEQIASVTGVLSEQQRL-------ICQGKVLKDDQLLSAYHVEDGHTLHLV 118
Cdd:cd01789    18 RFDLSLTIGELKEKLELITGTPPSSMKLqlydedgKLIGTLDDDDALLGSYPVRDGMRIHVV 79