C-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6); This model characterizes the carboxy (C)-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6), which is one of several TAFs that bind TBP and are involved in forming the Transcription Factor IID (TFIID) complex. This C-terminal HEAT repeat domain of TAF6 (TAF6C) is proposed to form a homodimer that effectively bridges the downstream promoter-interacting TAFs (TAF1, -2, and -7) with lobe B of TFIID. This domain influences the TAF6-TAF9 complex, is thus important for TFIID assembly, and may trigger signals from transcriptional effectors. The HEAT domain motif is generally involved in protein/protein interactions, and in A. locustae, the conserved TAF6C domain is formed by five HEAT repeats, tightly packed against each other, defining a single structural domain. TFIID is one of several General Transcription Factors (GTFs), which also include TFIIA, TFIIB, TFIIE, TFIIF and TFIIH, that are involved in the accurate initiation of transcription by RNA polymerase II in eukaryotes. TFIID plays a key role in the recognition of promoter DNA and assembly of the pre-initiation complex. The TFIID complex is composed of the TBP and at least 13 TAFs. TAFs are named after their electrophoretic mobility in polyacrylamide gels in different species. A new, unified nomenclature has been suggested for the pol II TAFs to show the relationship between TAF orthologs and paralogs. Several hypotheses are proposed for TAFs' functions such as serving as activator-binding sites, core-promoter recognition, or a role in essential catalytic activity. These TAFs, with the help of specific activators, are required only for expression of a subset of genes and are not universally involved for transcription, as are GTFs. In yeast and human cells, TAFs have been found as components of other complexes besides TFIID. Several TAFs interact via histone-fold domain (HFD) motifs; the HFD is the interaction motif involved in heterodimerization of the core histones and their assembly into nucleosome octamers. The minimal HFD contains three alpha-helices linked by two loops and is found in core histones, TAFs and many other transcription factors. TFIID has a histone octamer-like substructure. TAF6 is a shared subunit of histone acetyltransferase complex SAGA and TFIID complexes. The N-terminal HFD of TAF6, interacts with the HFD of TAF9 and makes a novel histone-like heterodimer that is structurally related to histones H4 and H3. TAF6 may also interact with the downstream core promoter element (DPE).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 204 HELSVEQQLYYKEITEACVGSCEAKRAEALQSIATDPGLYQMLPRFSTFISEGVRVNVVqnNLALLIYLMRMVKALMDNP 283
Cdd:cd08050     2 HVLSKELQLYFEKITEALLGDDEELRKAALASLRTDPGLQPLLPYFVQFIAEGVTKNLR--NLALLIYLLRMVRALLDNP 79

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 284 TLYLEKYVHELIPAVMTCIVSRQLCLRPDVDNHWALRDFAARLVAQICKHFSTTTNNIQSRITKTFTKSWVDEKTPWTTR 363
Cdd:cd08050    80 HLFLEPYLHQLLPSVLTCLLAKQLGSRPPTDNHWALRDFAASLLAQICKKYSTSYPTLQPRITKTLLKALLDPSKPLTTH 159

                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 1431760124 364 YGSIAGLAELGHDVIKTLILPRLQQEGERIRSVLDGPVLSNIDRIGADHVQSLLLKH 420
Cdd:cd08050   160 YGAIVGLAALGPEAVRALLLPNLKAYLERLESELEDSSSNALKRIEAEKVYGALLKA 216

C-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6); This model characterizes the carboxy (C)-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6), which is one of several TAFs that bind TBP and are involved in forming the Transcription Factor IID (TFIID) complex. This C-terminal HEAT repeat domain of TAF6 (TAF6C) is proposed to form a homodimer that effectively bridges the downstream promoter-interacting TAFs (TAF1, -2, and -7) with lobe B of TFIID. This domain influences the TAF6-TAF9 complex, is thus important for TFIID assembly, and may trigger signals from transcriptional effectors. The HEAT domain motif is generally involved in protein/protein interactions, and in A. locustae, the conserved TAF6C domain is formed by five HEAT repeats, tightly packed against each other, defining a single structural domain. TFIID is one of several General Transcription Factors (GTFs), which also include TFIIA, TFIIB, TFIIE, TFIIF and TFIIH, that are involved in the accurate initiation of transcription by RNA polymerase II in eukaryotes. TFIID plays a key role in the recognition of promoter DNA and assembly of the pre-initiation complex. The TFIID complex is composed of the TBP and at least 13 TAFs. TAFs are named after their electrophoretic mobility in polyacrylamide gels in different species. A new, unified nomenclature has been suggested for the pol II TAFs to show the relationship between TAF orthologs and paralogs. Several hypotheses are proposed for TAFs' functions such as serving as activator-binding sites, core-promoter recognition, or a role in essential catalytic activity. These TAFs, with the help of specific activators, are required only for expression of a subset of genes and are not universally involved for transcription, as are GTFs. In yeast and human cells, TAFs have been found as components of other complexes besides TFIID. Several TAFs interact via histone-fold domain (HFD) motifs; the HFD is the interaction motif involved in heterodimerization of the core histones and their assembly into nucleosome octamers. The minimal HFD contains three alpha-helices linked by two loops and is found in core histones, TAFs and many other transcription factors. TFIID has a histone octamer-like substructure. TAF6 is a shared subunit of histone acetyltransferase complex SAGA and TFIID complexes. The N-terminal HFD of TAF6, interacts with the HFD of TAF9 and makes a novel histone-like heterodimer that is structurally related to histones H4 and H3. TAF6 may also interact with the downstream core promoter element (DPE).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 204 HELSVEQQLYYKEITEACVGSCEAKRAEALQSIATDPGLYQMLPRFSTFISEGVRVNVVqnNLALLIYLMRMVKALMDNP 283
Cdd:cd08050     2 HVLSKELQLYFEKITEALLGDDEELRKAALASLRTDPGLQPLLPYFVQFIAEGVTKNLR--NLALLIYLLRMVRALLDNP 79

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 284 TLYLEKYVHELIPAVMTCIVSRQLCLRPDVDNHWALRDFAARLVAQICKHFSTTTNNIQSRITKTFTKSWVDEKTPWTTR 363
Cdd:cd08050    80 HLFLEPYLHQLLPSVLTCLLAKQLGSRPPTDNHWALRDFAASLLAQICKKYSTSYPTLQPRITKTLLKALLDPSKPLTTH 159

                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 1431760124 364 YGSIAGLAELGHDVIKTLILPRLQQEGERIRSVLDGPVLSNIDRIGADHVQSLLLKH 420
Cdd:cd08050   160 YGAIVGLAALGPEAVRALLLPNLKAYLERLESELEDSSSNALKRIEAEKVYGALLKA 216

TAF6 C-terminal HEAT repeat domain; TAF6_C is the C-terminal domain of the TAF6 subunit of the general transcription factor TFIID. The crystal structure reveals the presence of five conserved HEAT repeats. This region is necessary for the complexing together of the subunits TAF5, TAF6 and TAF9.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 298 VMTCIVSRQLCLRPDVDNHWALRDFAARLVAQICKHFSTTTNNIQSRITKTFTKSWVDEKTPWTTRYGSIAGLAELGHDV 377
Cdd:pfam07571   1 ILTCLVAKKLGARPPLDDHWALRDFAASLLAQICRKYSSSYPTLKPRITRTLLKALLDPKKPLGTHYGALIGLAALGPEA 80

                          90
                  ....*....|
gi 1431760124 378 IKTLILPRLQ 387
Cdd:pfam07571  81 IRALILPNLK 90

TATA box binding protein associated factor (TAF); TAF proteins adopt a histone-like fold.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 1431760124  11 NTVLPSESMKVVAESMGIAQIQEETCQLLTD----------EDALKFMHMGKRQKLTTSDIDYALK 66
Cdd:pfam02969   1 TSIIPQESVKVVAESLGITNLNDEAAALLAEdveyrlkeivQEAAKFMRHSKRTKLTVADVDSALR 66

C-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6); This model characterizes the carboxy (C)-terminal domain of TATA Binding Protein (TBP) Associated Factor 6 (TAF6), which is one of several TAFs that bind TBP and are involved in forming the Transcription Factor IID (TFIID) complex. This C-terminal HEAT repeat domain of TAF6 (TAF6C) is proposed to form a homodimer that effectively bridges the downstream promoter-interacting TAFs (TAF1, -2, and -7) with lobe B of TFIID. This domain influences the TAF6-TAF9 complex, is thus important for TFIID assembly, and may trigger signals from transcriptional effectors. The HEAT domain motif is generally involved in protein/protein interactions, and in A. locustae, the conserved TAF6C domain is formed by five HEAT repeats, tightly packed against each other, defining a single structural domain. TFIID is one of several General Transcription Factors (GTFs), which also include TFIIA, TFIIB, TFIIE, TFIIF and TFIIH, that are involved in the accurate initiation of transcription by RNA polymerase II in eukaryotes. TFIID plays a key role in the recognition of promoter DNA and assembly of the pre-initiation complex. The TFIID complex is composed of the TBP and at least 13 TAFs. TAFs are named after their electrophoretic mobility in polyacrylamide gels in different species. A new, unified nomenclature has been suggested for the pol II TAFs to show the relationship between TAF orthologs and paralogs. Several hypotheses are proposed for TAFs' functions such as serving as activator-binding sites, core-promoter recognition, or a role in essential catalytic activity. These TAFs, with the help of specific activators, are required only for expression of a subset of genes and are not universally involved for transcription, as are GTFs. In yeast and human cells, TAFs have been found as components of other complexes besides TFIID. Several TAFs interact via histone-fold domain (HFD) motifs; the HFD is the interaction motif involved in heterodimerization of the core histones and their assembly into nucleosome octamers. The minimal HFD contains three alpha-helices linked by two loops and is found in core histones, TAFs and many other transcription factors. TFIID has a histone octamer-like substructure. TAF6 is a shared subunit of histone acetyltransferase complex SAGA and TFIID complexes. The N-terminal HFD of TAF6, interacts with the HFD of TAF9 and makes a novel histone-like heterodimer that is structurally related to histones H4 and H3. TAF6 may also interact with the downstream core promoter element (DPE).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 204 HELSVEQQLYYKEITEACVGSCEAKRAEALQSIATDPGLYQMLPRFSTFISEGVRVNVVqnNLALLIYLMRMVKALMDNP 283
Cdd:cd08050     2 HVLSKELQLYFEKITEALLGDDEELRKAALASLRTDPGLQPLLPYFVQFIAEGVTKNLR--NLALLIYLLRMVRALLDNP 79

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 284 TLYLEKYVHELIPAVMTCIVSRQLCLRPDVDNHWALRDFAARLVAQICKHFSTTTNNIQSRITKTFTKSWVDEKTPWTTR 363
Cdd:cd08050    80 HLFLEPYLHQLLPSVLTCLLAKQLGSRPPTDNHWALRDFAASLLAQICKKYSTSYPTLQPRITKTLLKALLDPSKPLTTH 159

                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 1431760124 364 YGSIAGLAELGHDVIKTLILPRLQQEGERIRSVLDGPVLSNIDRIGADHVQSLLLKH 420
Cdd:cd08050   160 YGAIVGLAALGPEAVRALLLPNLKAYLERLESELEDSSSNALKRIEAEKVYGALLKA 216

TAF6 C-terminal HEAT repeat domain; TAF6_C is the C-terminal domain of the TAF6 subunit of the general transcription factor TFIID. The crystal structure reveals the presence of five conserved HEAT repeats. This region is necessary for the complexing together of the subunits TAF5, TAF6 and TAF9.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1431760124 298 VMTCIVSRQLCLRPDVDNHWALRDFAARLVAQICKHFSTTTNNIQSRITKTFTKSWVDEKTPWTTRYGSIAGLAELGHDV 377
Cdd:pfam07571   1 ILTCLVAKKLGARPPLDDHWALRDFAASLLAQICRKYSSSYPTLKPRITRTLLKALLDPKKPLGTHYGALIGLAALGPEA 80

                          90
                  ....*....|
gi 1431760124 378 IKTLILPRLQ 387
Cdd:pfam07571  81 IRALILPNLK 90

TATA box binding protein associated factor (TAF); TAF proteins adopt a histone-like fold.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 1431760124  11 NTVLPSESMKVVAESMGIAQIQEETCQLLTD----------EDALKFMHMGKRQKLTTSDIDYALK 66
Cdd:pfam02969   1 TSIIPQESVKVVAESLGITNLNDEAAALLAEdveyrlkeivQEAAKFMRHSKRTKLTVADVDSALR 66

histone-fold domain found in transcription initiation factor TFIID subunit 6 (TAF6) and similar proteins; This subfamily includes TAF6 and TAF6-like RNA polymerase II p300/CBP-associated factor-associated factor 65 kDa subunit 6L (TAF6L). TAF6, also called TATA Binding Protein (TBP) associated factor 6, RNA polymerase II TBP-associated factor subunit E, transcription initiation factor TFIID 70 kDa subunit (TAF(II)70, TAFII-70, TAFII70), or transcription initiation factor TFIID 80 kDa subunit, (TAF(II)80, TAFII-80, TAFII80), is a TBP-associated factor (TAF). TAFs are components of the transcription factor IID (TFIID) complex, PCAF histone acetylase complex, and TBP-free TAFII complex (TFTC). TIIFD is a multimeric protein complex that plays a central role in mediating promoter responses to various activators and repressors. TFIID and PCAF are composed of TATA binding protein (TBP) and several TAFs. TBP is not part of TFTC. TAF6L, also called PCAF-associated factor 65-alpha (PAF65-alpha), is a component of the PCAF complex, which can efficiently acetylate histones in a nucleosomal context. The PCAF complex is composed of several TAFs and PCAF-associated factors (PAFs). It might be the human version of the yeast SAGA complex. With TAF5L, TAF6L acts as an epigenetic regulator essential for somatic reprogramming. It also regulates target genes through H3K9ac deposition and MYC recruitment, which trigger the MYC regulatory network to orchestrate gene expression programs to control embryonic stem cell state.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 1431760124  14 LPSESMKVVAESMGIAQIQEETCQLLTDE----------DALKFMHMGKRQKLTTSDIDYALKL 67
Cdd:cd22917     1 FPNDTVKLIAESLGIVNLSEEVAQLLAEDaeyrileviqNAKKFAHHSKRKKLTADDINNALRL 64

histone fold domain (HFD) superfamily; The histone fold domain (HFD) is a structurally conserved interaction motif involved in heterodimerization of the core histones and their assembly into the nucleosome octamer. Histone fold heterodimers play crucial roles in gene regulation. The minimal HFD consists of three alpha helices connected by two short, unstructured loops. The HFD is found in core histones, TATA box-binding protein-associated factors (TAFs), and many other transcription factors. HFD plays a role in the nucleosomal core particle by conserving histone interactions; these contain more than one HFD. The structure of the nucleosome core particle has two modes that have the largest interaction surfaces, and these are the H3-H4 and H2A-H2B heterodimer interactions. Several TAFs interact via histone-fold (HF) motifs. Five HF-containing TAF pairs have been described in transcription factor II D (TFIID): TAF6-TAF9, TAF4-TAF12, TAF11-TAF13, TAF8-TAF10 and TAF3-TAF10.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 1431760124  14 LPSESMKVVAESMGIAQIQEETCQLLTD----------EDALKFMHMGKRQKLTTSDIDYALK 66
Cdd:cd00076     1 LLRSAVARILKSAGFDSVSKSALELLSDlleryleelaRAAKAYAELAGRTTPNAEDVELALE 63