Protein: Transcription initiation factor TFIID subunit 1 (EC 2.3.1.48) (EC 2.7.11.1) (Cell cycle gene 1 protein) (TBP-associated factor 250 kDa) (p250) (Transcription initiation factor TFIID 250 kDa subunit) (TAF(II)250) (TAFII-250) (TAFII250) (Q60544)
Organism: Mesocricetus auratus (Golden hamster)
Function: The TFIID basal transcription factor complex plays a major role in the initiation of RNA polymerase II (Pol II)-dependent transcription. TFIID recognizes and binds promoters with or without a TATA box via its subunit TBP, a TATA-box-binding protein, and promotes assembly of the pre-initiation complex (PIC). The TFIID complex consists of TBP and TBP-associated factors (TAFs), including TAF1, TAF2, TAF3, TAF4, TAF5, TAF6, TAF7, TAF8, TAF9, TAF10, TAF11, TAF12 and TAF13. TAF1 is the largest component and core scaffold of the TFIID complex, involved in nucleating complex assembly. TAF1 forms a promoter DNA binding subcomplex of TFIID, together with TAF7 and TAF2. Contains novel N- and C-terminal Ser/Thr kinase domains which can autophosphorylate or transphosphorylate other transcription factors. Phosphorylates TP53 on 'Thr-55' which leads to MDM2-mediated degradation of TP53. Phosphorylates GTF2A1 and GTF2F1 on Ser residues. Possesses DNA-binding activity (By similarity). Essential for progression of the G1 phase of the cell cycle.
Subcellular location: Nucleus {ECO:0000250|UniProtKB:P21675}.
Interaction partners:
- Transcription initiation factor TFIID subunit 12
- Transcription initiation factor TFIID subunit 2
- Transcription initiation factor TFIID subunit 10
- Transcription initiation factor TFIID subunit 6
- Transcription initiation factor TFIID subunit 11
- Transcription initiation factor TFIID subunit 3
- TATA-box-binding protein
- Transcription initiation factor IIB
- Transcription initiation factor TFIID subunit 8
- Transcription initiation factor TFIID subunit 4
Sequence:
MLLPATGASRSAAIMSDTDSDEDSSGGGPFSLTGFLFGNINGAGQLEGESVLDDECKKHLAGLGALGLGSLITELTANEELAGTDGALVNDEGWIRSREDAVDYSDINEVAEDESRRYQQTMGSLQPLCHSADYDEDDYDADCEDIDCKLMPPPPPPPGPVKKEKDQDGLTGEKVDFSSSSDSESEMGPQEAAQAESKDGKLTLPLAGIMQHDATKLLPSVTELFPEFRPGKVLRFLRLFGPGKNVPSVWRSARRKRKKKHREPIQEEQIQEEECSVELEVNQKSLWNYDYAPPPPPEQCLSDDEITMMAPVESKFSQSTGDTDKVMDTKPRVAEWRYGPARLWYDMLGVPEDGSGFDYGFKMRKTEHEPAIKCKMMTKLRKLEESNGIDLLADENFLMVTQLHWEDDIIWDGEDVKHKGTKPQRASLAGWLPSSMTRNAMAYNVQQGFAATLDDDKPWYSIFPIDNEDLVYGRWEDNIIWDAQAMPRILEPPVLTLDPNDENLILEIPDEKEEATSNSPSKENKKESSLKKSRILLGKTGVIKEEPQQNMSQPEVKDPWNLSNDEYYYPKQQGLRGTFGGNIIQHSIPAVELRQPFFPTHMGPIKLRQFHRPPLKKYSFGALSQPGPHSVQPLLKHIKKKAKMREQERQASGGGEMFFMRTPQDLTGKDGDLILAEYSEENGPLMMQVGMATKIKNYYKRKPGKDPGAPDCKYGETVYCHTSPFLGSLHPGQLLQAFENNLFRAPIYLHKMPETDFLIIRTRQGYYIRELVDIFVVGQQCPLFEVPGPNSKRANTHIRDFLQVFIYRLFWKSKDRPRRIRMEDIKKAFPSHSESSIRKRLKLCADFKRTGMDSNWWVLKSDFRLPTEEEIRAMVSPEQCCAYYSMIAAEQRLKDAGYGEKSFFAPEEENEEDFQMKIDDEVRTAPWNTTRAFIAAMKGKCLLEVTGVADPTGCGEGFSYVKIPNKPTQQKDDKEPQPVKKTVTGTDADLRRLSLKNAKQLLRKFGVPEEEIKKLSRWEVIDVVRTMSTEQARSGEGPMSKFARGSRFSVAEHQERYKEECQRIFDLQNKVLSSTEVLSTDTDSSSAEDSDFEEMGKNIENMLQNKKTSSQLSREREEQERKELQRMLLAAGSASAGNNHRDDDTASVTSLNSSATGRCLKIYRTFRDEEGKEYVRCETVRKPAVIDAYVRIRTTKDEEFIRKFALFDEQHREEMRKERRRIQEQLRRLKRNQEKEKLKGPPEKKPKKMKERPDLKLKCGACGAIGHMRTNKFCPLYYQTNAPPSNPVAMTEEQEEELEKTVIHNDNEELIKVEGTKIVLGKQLIESADEVRRKSLVLKFPKQQLPPKKKRRVGTTVHCDYLNRPHKSIHRRRTDPMVTLSSILESIINDMRDLPNTYPFHTPVNAKVVKDYYKIITRPMDLQTLRENVRKRLYPSREEFREHLELIVKNSATYNGPKHSLTQISQSMLDLCDEKLKEKEDKLARLEKAINPLLDDDDQVAFSFILDNIVTQKMMAVPDSWPFHHPVNKKFVPDYYKVIVSPMDLETIRKNISKHKYQSRESFLDDVNLILANSVKYNGSESQYTKTAQEIVNVCYQTLTEYDEHLTQLEKDICTAKEAALEEAELESLDPMTPGPYTPQPPDLYDNSTSLSVSRDASVYQDESNMSVLDIPSATSEKQLTQEGEDGDGDLADEEEGTVQQPQASVLYEDLLMSEGEDDEEDAGSDEEGDNPFSAIQLSESGSDSDVGSGSIRPKQPRVLQENTRMGMENEESMMSYEGDGGEVSRGLEDSNISYGSYEEPDPKSNTQDTSFSSIGGYEVSEEEEDEEEQRSGPSVLSQVHLSEDEEDSEDFHSIAGDSDMDSDE