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Reviewed, UniProtKB/Swiss-Prot Q15788 (NCOA1_HUMAN)

Last modified November 25, 2008. Version 65. Feed History...

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Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Web resources · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Nuclear receptor coactivator 1
      Short name=NCoA-1
    EC=2.3.1.48
Alternative name(s):
    Steroid receptor coactivator 1
      Short name=SRC-1
    RIP160
    Protein Hin-2
    Renal carcinoma antigen NY-REN-52
Gene names
Name: NCOA1
Synonyms: SRC1
OrganismHomo sapiens (Human)
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length1441 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Nuclear receptor coactivator that directly binds nuclear receptors and stimulates the transcriptional activities in a hormone-dependent fashion. Involved in the coactivation of different nuclear receptors, such as for steroids (PGR, GR and ER), retinoids (RXRs), thyroid hormone (TRs) and prostanoids (PPARs). Also involved in coactivation mediated by STAT3, STAT5A, STAT5B and STAT6 transcription factors. Displays histone acetyltransferase activity toward H3 and H4; the relevance of such activity remains however unclear. Plays a central role in creating multisubunit coactivator complexes that act via remodeling of chromatin, and possibly acts by participating in both chromatin remodeling and recruitment of general transcription factors. Required with NCOA2 to control energy balance between white and brown adipose tissues. Required for mediating steroid hormone response. Isoform 2 has a higher thyroid hormone-dependent transactivation activity than isoform 1 and isoform 3.

Catalytic activity

Acetyl-CoA + histone = CoA + acetylhistone.

Subunit structure

Interacts with the methyltransferase CARM1 By similarity. Interacts with NCOA6 and NCOA2. Interacts with the FDL motif of STAT5A and STAT5B. Interacts with the LXXLL motif of STAT6. Interacts with STAT3 following IL-6 stimulation. Interacts with the basal transcription factor GTF2B. Interacts with the histone acetyltransferases EP300 and CREBBP. Interacts with PCAF, COPS5, NR3C1 and TTLL5/STAMP.

Subcellular location

NucleusBy similarity.

Tissue specificity

Widely expressed.

Domain

The C-terminal (1107-1441) part mediates the histone acetyltransferase (HAT) activity.

Contains 7 Leu-Xaa-Xaa-Leu-Leu (LXXLL) motifs. LXXLL motifs 3, 4 and 5 are essential for the association with nuclear receptors. LXXLL motif 7, which is not present in isoform 2, increases the affinity for steroid receptors in vitro.

Post-translational modification

Sumoylated; sumoylation increases its interaction with PGR and prolongs its retention in the nucleus. It does not prevent its ubiquitination and does not exert a clear effect on the stability of the protein.

Ubiquitinated; leading to proteasome-mediated degradation. Ubiquitination and sumoylation take place at different sites.

Phosphorylated upon DNA damage, probably by ATM or ATR.

Involvement in disease

A chromosomal aberration involving NCOA1 is a cause of rhabdomyosarcoma. Translocation t(2;2)(q35;p23) with PAX3 generates the NCOA1-PAX3 oncogene consisting of the N-terminus part of PAX3 and the C-terminus part of NCOA1. The fusion protein acts as a transcriptional activator. Rhabdomyosarcoma is the most common soft tissue carcinoma in childhood, representing 5-8% of all malignancies in children.

Sequence similarities

Belongs to the SRC/p160 nuclear receptor coactivator family.

Contains 1 basic helix-loop-helix (bHLH) domain.

Contains 1 PAS (PER-ARNT-SIM) domain.

Binary interactions

With

Entry

#Exp.

IntAct

Notes

Nfkb1P257991EBI-455189,EBI-643958From a different organism.
Nr3c1P065362EBI-455189,EBI-1187143From a different organism.

Alternative products

This entry describes 3 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: Q15788-1)

Also known as: SRC-1A; SRC1a;

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform 2 (identifier: Q15788-2)

Also known as: SRC-1E; SRC1e;

The sequence of this isoform differs from the canonical sequence as follows:
     1386-1441: QVQQVQVFADVQCTVNLVGGDPYLNQPGPLGTQKPTSGPQTPQAQQKSLLQQLLTE → DKKTEEFFSVVTTD
Notes: Major form. Contains a domain at its C-terminus (1241-1399) that is able to mediate transactivation.
Isoform 3 (identifier: Q15788-3)

Also known as: SRC-1 (-Q);

The sequence of this isoform differs from the canonical sequence as follows:
     1385-1385: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 14411441Nuclear receptor coactivator 1
PRO_0000094400

Regions

Domain21 – 8161Helix-loop-helix motif
Domain109 – 18072PAS
DNA binding17 – 204Basic motif
Region361 – 567207Interaction with STAT3
Region781 – 988208Interaction with CREBBP
Motif46 – 505LXXLL motif 1
Motif112 – 1165LXXLL motif 2
Motif633 – 6375LXXLL motif 3
Motif690 – 6945LXXLL motif 4
Motif749 – 7535LXXLL motif 5
Motif913 – 9175LXXLL motif 6
Motif1435 – 14395LXXLL motif 7
Compositional bias389 – 682294Ser-rich
Compositional bias1053 – 113886Gln-rich

Sites

Site867 – 8682Breakpoint for translocation to form PAX3-NCOA1 oncogene

Amino acid modifications

Modified residue1031Phosphoserine
Modified residue3721Phosphoserine
Modified residue3951Phosphoserine
Modified residue5171Phosphoserine
Modified residue5691Phosphoserine
Modified residue10331Phosphoserine
Modified residue11791Phosphothreonine
Modified residue11851Phosphoserine
Cross-link732Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO)
Cross-link774Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO)

Natural variations

Alternative sequence13851Missing in isoform 3.
VSP_011738
Alternative sequence1386 – 144156QVQQV…QLLTE → DKKTEEFFSVVTTD in isoform 2.
VSP_011739
Natural variant4571Q → K: dbSNP rs1049015.
VAR_019768
Natural variant4661N → K: dbSNP rs1049016.
VAR_019769
Natural variant4741S → P: dbSNP rs1049018.
VAR_019770
Natural variant5911I → T: dbSNP rs1049020.
VAR_019771
Natural variant6851E → A: dbSNP rs1049021.
VAR_019772
Natural variant7941P → A: dbSNP rs1049025.
VAR_019773
Natural variant9991S → F: dbSNP rs1049032.
VAR_019774
Natural variant11541M → T: dbSNP rs1049038.
VAR_019775
Natural variant12381V → I
VAR_038832
Natural variant12721P → S: dbSNP rs1804645.
VAR_034882

Experimental info

Mutagenesis636 – 6372LL → AA: Slightly affects interactions with steroid receptors. Abolishes interactions with steroid receptors; when associated with A-693; A-694; A-752 and A-753
Mutagenesis693 – 6942LL → AA: Slightly affects interactions with steroid receptors. Abolishes interactions with steroid receptors; when associated with A-636; A-637; A-752 and A-753
Mutagenesis7321K → R: Abolishes sumoylation; when associated with R-774
Mutagenesis752 – 7532LL → AA: Slightly affects interactions with steroid receptors. Abolishes interactions with steroid receptors; when associated with A-636; A-637; A-693 and A-694
Mutagenesis7741K → R: Abolishes sumoylation; when associated with R-732
Mutagenesis8001K → R: Does not affect sumoylation of the protein
Mutagenesis8461K → R: Does not affect sumoylation of the protein
Mutagenesis13781K → R: Does not affect sumoylation of the protein
Sequence conflict10351Missing in AAT47737. Ref.10
Sequence conflict13701Q → H in AAA64187. Ref.9
Sequence conflict13821D → G in AAT47737. Ref.10
Sequence conflict14351L → R in AAB50242. Ref.3

Secondary structure

................. 1441
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 (SRC-1A) (SRC1a) [UniParc].

Last modified September 11, 2007. Version 3.
Checksum: 25EF6F389489121E

FASTA1,441156,757
        10         20         30         40         50         60 
MSGLGDSSSD PANPDSHKRK GSPCDTLASS TEKRRREQEN KYLEELAELL SANISDIDSL 

        70         80         90        100        110        120 
SVKPDKCKIL KKTVDQIQLM KRMEQEKSTT DDDVQKSDIS SSSQGVIEKE SLGPLLLEAL 

       130        140        150        160        170        180 
DGFFFVVNCE GRIVFVSENV TSYLGYNQEE LMNTSVYSIL HVGDHAEFVK NLLPKSLVNG 

       190        200        210        220        230        240 
VPWPQEATRR NSHTFNCRML IHPPDEPGTE NQEACQRYEV MQCFTVSQPK SIQEDGEDFQ 

       250        260        270        280        290        300 
SCLICIARRL PRPPAITGVE SFMTKQDTTG KIISIDTSSL RAAGRTGWED LVRKCIYAFF 

       310        320        330        340        350        360 
QPQGREPSYA RQLFQEVMTR GTASSPSYRF ILNDGTMLSA HTKCKLCYPQ SPDMQPFIMG 

       370        380        390        400        410        420 
IHIIDREHSG LSPQDDTNSG MSIPRVNPSV NPSISPAHGV ARSSTLPPSN SNMVSTRINR 

       430        440        450        460        470        480 
QQSSDLHSSS HSNSSNSQGS FGCSPGSQIV ANVALNQGQA SSQSSNPSLN LNNSPMEGTG 

       490        500        510        520        530        540 
ISLAQFMSPR RQVTSGLATR PRMPNNSFPP NISTLSSPVG MTSSACNNNN RSYSNIPVTS 

       550        560        570        580        590        600 
LQGMNEGPNN SVGFSASSPV LRQMSSQNSP SRLNIQPAKA ESKDNKEIAS ILNEMIQSDN 

       610        620        630        640        650        660 
SSSDGKPLDS GLLHNNDRLS DGDSKYSQTS HKLVQLLTTT AEQQLRHADI DTSCKDVLSC 

       670        680        690        700        710        720 
TGTSNSASAN SSGGSCPSSH SSLTERHKIL HRLLQEGSPS DITTLSVEPD KKDSASTSVS 

       730        740        750        760        770        780 
VTGQVQGNSS IKLELDASKK KESKDHQLLR YLLDKDEKDL RSTPNLSLDD VKVKVEKKEQ 

       790        800        810        820        830        840 
MDPCNTNPTP MTKPTPEEIK LEAQSQFTAD LDQFDQLLPT LEKAAQLPGL CETDRMDGAV 

       850        860        870        880        890        900 
TSVTIKSEIL PASLQSATAR PTSRLNRLPE LELEAIDNQF GQPGTGDQIP WTNNTVTAIN 

       910        920        930        940        950        960 
QSKSEDQCIS SQLDELLCPP TTVEGRNDEK ALLEQLVSFL SGKDETELAE LDRALGIDKL 

       970        980        990       1000       1010       1020 
VQGGGLDVLS ERFPPQQATP PLIMEERPNL YSQPYSSPSP TANLPSPFQG MVRQKPSLGT 

      1030       1040       1050       1060       1070       1080 
MPVQVTPPRG AFSPGMGMQP RQTLNRPPAA PNQLRLQLQQ RLQGQQQLIH QNRQAILNQF 

      1090       1100       1110       1120       1130       1140 
AATAPVGINM RSGMQQQITP QPPLNAQMLA QRQRELYSQQ HRQRQLIQQQ RAMLMRQQSF 

      1150       1160       1170       1180       1190       1200 
GNNLPPSSGL PVQMGNPRLP QGAPQQFPYP PNYGTNPGTP PASTSPFSQL AANPEASLAN 

      1210       1220       1230       1240       1250       1260 
RNSMVSRGMT GNIGGQFGTG INPQMQQNVF QYPGAGMVPQ GEANFAPSLS PGSSMVPMPI 

      1270       1280       1290       1300       1310       1320 
PPPQSSLLQQ TPPASGYQSP DMKAWQQGAI GNNNVFSQAV QNQPTPAQPG VYNNMSITVS 

      1330       1340       1350       1360       1370       1380 
MAGGNTNVQN MNPMMAQMQM SSLQMPGMNT VCPEQINDPA LRHTGLYCNQ LSSTDLLKTE 

      1390       1400       1410       1420       1430       1440 
ADGTQQVQQV QVFADVQCTV NLVGGDPYLN QPGPLGTQKP TSGPQTPQAQ QKSLLQQLLT 


E 

« Hide

Isoform 2 (SRC-1E) (SRC1e) [UniParc].

Checksum: DACE967B31AC6B69
Show »

1,399152,385
Isoform 3 (SRC-1 (-Q)) [UniParc].

Checksum: 4E3FFED7088CDBF8
Show »

1,440156,628

References

« Hide 'large scale' references
[1]"Molecular cloning and properties of a full-length putative thyroid hormone receptor coactivator."
Takeshita A., Yen P.M., Misiti S., Cardona G.R., Liu Y., Chin W.W.
Endocrinology 137:3594-3597(1996) [PubMed: 8754792] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 3), INTERACTION WITH GTF2B, VARIANTS LYS-457; LYS-466; PRO-474; THR-591; ALA-685; PHE-999 AND THR-1154.
[2]"Isoforms of steroid receptor coactivator 1 differ in their ability to potentiate transcription by the oestrogen receptor."
Kalkhoven E., Valentine J.E., Heery D.M., Parker M.G.
EMBO J. 17:232-243(1998) [PubMed: 9427757] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1 AND 2), FUNCTION, TISSUE SPECIFICITY, MUTAGENESIS OF 636-LEU-LEU-637; 693-LEU-LEU-694 AND 752-LEU-LEU-753.
[3]"The steroid receptor coactivator-1 contains multiple receptor interacting and activation domains that cooperatively enhance the activation function 1 (AF1) and AF2 domains of steroid receptors."
Onate S.A., Boonyaratanakornkit V., Spencer T.E., Tsai S.Y., Tsai M.-J., Edwards D.P., O'Malley B.W.
J. Biol. Chem. 273:12101-12108(1998) [PubMed: 9575154] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), VARIANTS LYS-457; LYS-466; PRO-474; THR-591; ALA-685; PHE-999 AND THR-1154.
Tissue: Heart muscle and Skeletal muscle.
[4]SeattleSNPs program for genomic applications
Submitted (JUN-2007) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], VARIANTS ILE-1238 AND SER-1272.
[5]"Generation and annotation of the DNA sequences of human chromosomes 2 and 4."