ID   SSN3_ASPTN              Reviewed;         435 AA.
AC   Q0CQK1;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   17-OCT-2006, sequence version 1.
DT   27-MAR-2024, entry version 91.
DE   RecName: Full=Serine/threonine-protein kinase ssn3;
DE            EC=2.7.11.22;
DE            EC=2.7.11.23;
DE   AltName: Full=Cyclin-dependent kinase 8;
GN   Name=ssn3; Synonyms=cdk8; ORFNames=ATEG_04033;
OS   Aspergillus terreus (strain NIH 2624 / FGSC A1156).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus;
OC   Aspergillus subgen. Circumdati.
OX   NCBI_TaxID=341663;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NIH 2624 / FGSC A1156;
RA   Birren B.W., Lander E.S., Galagan J.E., Nusbaum C., Devon K., Henn M.,
RA   Ma L.-J., Jaffe D.B., Butler J., Alvarez P., Gnerre S., Grabherr M.,
RA   Kleber M., Mauceli E.W., Brockman W., Rounsley S., Young S.K., LaButti K.,
RA   Pushparaj V., DeCaprio D., Crawford M., Koehrsen M., Engels R.,
RA   Montgomery P., Pearson M., Howarth C., Larson L., Luoma S., White J.,
RA   Alvarado L., Kodira C.D., Zeng Q., Oleary S., Yandava C., Denning D.W.,
RA   Nierman W.C., Milne T., Madden K.;
RT   "Annotation of the Aspergillus terreus NIH2624 genome.";
RL   Submitted (SEP-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Component of the srb8-11 complex. The srb8-11 complex is a
CC       regulatory module of the Mediator complex which is itself involved in
CC       regulation of basal and activated RNA polymerase II-dependent
CC       transcription. The srb8-11 complex may be involved in the
CC       transcriptional repression of a subset of genes regulated by Mediator.
CC       It may inhibit the association of the Mediator complex with RNA
CC       polymerase II to form the holoenzyme complex. The srb8-11 complex
CC       phosphorylates the C-terminal domain (CTD) of the largest subunit of
CC       RNA polymerase II (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-
CC         [protein]; Xref=Rhea:RHEA:17989, Rhea:RHEA-COMP:9863, Rhea:RHEA-
CC         COMP:11604, ChEBI:CHEBI:15378, ChEBI:CHEBI:29999, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:83421, ChEBI:CHEBI:456216; EC=2.7.11.22;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-
CC         threonyl-[protein]; Xref=Rhea:RHEA:46608, Rhea:RHEA-COMP:11060,
CC         Rhea:RHEA-COMP:11605, ChEBI:CHEBI:15378, ChEBI:CHEBI:30013,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:61977, ChEBI:CHEBI:456216;
CC         EC=2.7.11.22;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[DNA-directed RNA polymerase] + ATP = ADP + H(+) + phospho-
CC         [DNA-directed RNA polymerase]; Xref=Rhea:RHEA:10216, Rhea:RHEA-
CC         COMP:11321, Rhea:RHEA-COMP:11322, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:43176, ChEBI:CHEBI:68546,
CC         ChEBI:CHEBI:456216; EC=2.7.11.23;
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC   -!- SUBUNIT: Component of the srb8-11 complex, a regulatory module of the
CC       Mediator complex. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the protein kinase superfamily. CMGC Ser/Thr
CC       protein kinase family. CDC2/CDKX subfamily. {ECO:0000305}.
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DR   EMBL; CH476598; EAU35835.1; -; Genomic_DNA.
DR   RefSeq; XP_001213211.1; XM_001213211.1.
DR   AlphaFoldDB; Q0CQK1; -.
DR   SMR; Q0CQK1; -.
DR   STRING; 341663.Q0CQK1; -.
DR   EnsemblFungi; EAU35835; EAU35835; ATEG_04033.
DR   GeneID; 4318303; -.
DR   VEuPathDB; FungiDB:ATEG_04033; -.
DR   eggNOG; KOG0666; Eukaryota.
DR   HOGENOM; CLU_000288_181_6_1; -.
DR   OMA; YFKNGGP; -.
DR   OrthoDB; 46620at2759; -.
DR   Proteomes; UP000007963; Unassembled WGS sequence.
DR   GO; GO:1990508; C:CKM complex; IEA:EnsemblFungi.
DR   GO; GO:0016592; C:mediator complex; IEA:EnsemblFungi.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0004693; F:cyclin-dependent protein serine/threonine kinase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0106310; F:protein serine kinase activity; IEA:RHEA.
DR   GO; GO:0008353; F:RNA polymerase II CTD heptapeptide repeat kinase activity; IEA:UniProtKB-EC.
DR   GO; GO:0060258; P:negative regulation of filamentous growth; IEA:EnsemblFungi.
DR   GO; GO:0000122; P:negative regulation of transcription by RNA polymerase II; IEA:EnsemblFungi.
DR   GO; GO:0070481; P:nuclear-transcribed mRNA catabolic process, non-stop decay; IEA:EnsemblFungi.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   GO; GO:0000435; P:positive regulation of transcription from RNA polymerase II promoter by galactose; IEA:EnsemblFungi.
DR   GO; GO:0031648; P:protein destabilization; IEA:EnsemblFungi.
DR   CDD; cd07842; STKc_CDK8_like; 1.
DR   Gene3D; 1.10.510.10; Transferase(Phosphotransferase) domain 1; 1.
DR   InterPro; IPR011009; Kinase-like_dom_sf.
DR   InterPro; IPR000719; Prot_kinase_dom.
DR   InterPro; IPR008271; Ser/Thr_kinase_AS.
DR   PANTHER; PTHR24056; CELL DIVISION PROTEIN KINASE; 1.
DR   PANTHER; PTHR24056:SF495; CYCLIN-DEPENDENT KINASE 8; 1.
DR   Pfam; PF00069; Pkinase; 1.
DR   SMART; SM00220; S_TKc; 1.
DR   SUPFAM; SSF56112; Protein kinase-like (PK-like); 1.
DR   PROSITE; PS50011; PROTEIN_KINASE_DOM; 1.
DR   PROSITE; PS00108; PROTEIN_KINASE_ST; 1.
PE   3: Inferred from homology;
KW   Activator; ATP-binding; Kinase; Magnesium; Metal-binding;
KW   Nucleotide-binding; Nucleus; Reference proteome; Repressor;
KW   Serine/threonine-protein kinase; Transcription; Transcription regulation;
KW   Transferase.
FT   CHAIN           1..435
FT                   /note="Serine/threonine-protein kinase ssn3"
FT                   /id="PRO_0000312937"
FT   DOMAIN          49..377
FT                   /note="Protein kinase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
FT   REGION          398..435
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        181
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159,
FT                   ECO:0000255|PROSITE-ProRule:PRU10027"
FT   BINDING         55..63
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
FT   BINDING         79
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
SQ   SEQUENCE   435 AA;  49087 MW;  802A04756FBAE615 CRC64;
     MYGRNFPFFN SLGGFYPRGN GFPLDAPSLD PRKPSGTGYT SKVRVRDKYR IVGFISSGTY
     GRVYKAIGKN GEKREFAIKK FKPDKEGEII QYTGLSQSAI REMSLCSELD HPNVVQLEEI
     ILEDKCIFMV FEYTEHDLLQ IIHHHTQPQR HAIPAPMVRS ILFQLLNGLL YLHTNWVLHR
     DLKPANILVT SSGAIRVGDL GLARLFYKPL NSLFSGDKVV VTIWYRAPEL LMGSRHYTPA
     VDLWAVGCIF AELLSLRPIF KGEEAKMDSK KTVPFQRNQM MKIIEIMGLP TKEIWPGITS
     MPEFSQLQSL AMSRAPHFNR SSNLENWYQS CLKNGGYSAN SSAGTPGADG FDLLSRLLEY
     DPTKRITARE ALEHPYFKNG GPISANCFEG FEGKYPHRRV TQDDNDIRSG SLPGTKRSGL
     PDDSLMGRAS KRIKE
//