VE2_HPV5B
ID VE2_HPV5B Reviewed; 514 AA.
AC P26545;
DT 01-AUG-1992, integrated into UniProtKB/Swiss-Prot.
DT 01-AUG-1992, sequence version 1.
DT 03-AUG-2022, entry version 109.
DE RecName: Full=Regulatory protein E2 {ECO:0000255|HAMAP-Rule:MF_04001};
GN Name=E2 {ECO:0000255|HAMAP-Rule:MF_04001};
OS Human papillomavirus type 5b.
OC Viruses; Monodnaviria; Shotokuvirae; Cossaviricota; Papovaviricetes;
OC Zurhausenvirales; Papillomaviridae; Firstpapillomavirinae;
OC Betapapillomavirus.
OX NCBI_TaxID=10599;
OH NCBI_TaxID=9606; Homo sapiens (Human).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=1649510; DOI=10.1016/0042-6822(91)91013-7;
RA Yabe Y., Sakai A., Hitsumoto T., Kato H., Ogura H.;
RT "A subtype of human papillomavirus 5 (HPV-5b) and its subgenomic segment
RT amplified in a carcinoma: nucleotide sequences and genomic organizations.";
RL Virology 183:793-798(1991).
CC -!- FUNCTION: Plays a role in the initiation of viral DNA replication. A
CC dimer of E2 interacts with a dimer of E1 in order to improve
CC specificity of E1 DNA binding activity. Once the complex recognizes and
CC binds DNA at specific sites, the E2 dimer is removed from DNA. E2 also
CC regulates viral transcription through binding to the E2RE response
CC element (5'-ACCNNNNNNGGT-3') present in multiple copies in the
CC regulatory regions of the viral genome. Activates or represses
CC transcription depending on E2RE's position with regards to proximal
CC promoter elements including the TATA-box. Repression occurs by
CC sterically hindering the assembly of the transcription initiation
CC complex. {ECO:0000255|HAMAP-Rule:MF_04001}.
CC -!- SUBUNIT: Binds DNA as homodimer. Interacts with protein E1; this
CC interaction greatly increases E1 DNA-binding activity. Interacts with
CC protein L1; this interaction enhances E2-dependent replication and
CC transcription activation. Interacts with protein L2; this interaction
CC inhibits E2 transcriptional activity but not DNA replication function
CC E2. Interacts with protein E7; this interaction inhibits E7 oncogenic
CC activity. Interacts with host TAF1; this interaction modulates E2-
CC dependent transcriptional regulation. Interacts with host BRD4; this
CC interaction mediates E2 transcriptional activation function.
CC Additionally, the interaction with host BRD4 on mitotic chromosomes
CC mediates tethering of the viral genome. Interacts with host TOPBP1;
CC this interaction is required for optimal viral DNA replication.
CC {ECO:0000255|HAMAP-Rule:MF_04001}.
CC -!- SUBCELLULAR LOCATION: Host nucleus {ECO:0000255|HAMAP-Rule:MF_04001}.
CC -!- PTM: Phosphorylated. {ECO:0000255|HAMAP-Rule:MF_04001}.
CC -!- PTM: Sumoylation plays a regulatory role in E2 transcriptional
CC activity. {ECO:0000255|HAMAP-Rule:MF_04001}.
CC -!- SIMILARITY: Belongs to the papillomaviridae E2 protein family.
CC {ECO:0000255|HAMAP-Rule:MF_04001}.
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DR EMBL; D90252; BAA14295.1; -; Genomic_DNA.
DR PIR; B40480; W2WLB5.
DR SMR; P26545; -.
DR PRIDE; P26545; -.
DR Proteomes; UP000007669; Genome.
DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003700; F:DNA-binding transcription factor activity; IEA:UniProtKB-UniRule.
DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-UniRule.
DR GO; GO:0006260; P:DNA replication; IEA:UniProtKB-KW.
DR GO; GO:0006275; P:regulation of DNA replication; IEA:UniProtKB-UniRule.
DR GO; GO:0006351; P:transcription, DNA-templated; IEA:UniProtKB-UniRule.
DR GO; GO:0039693; P:viral DNA genome replication; IEA:UniProtKB-UniRule.
DR Gene3D; 1.10.287.30; -; 1.
DR Gene3D; 2.170.200.10; -; 1.
DR Gene3D; 3.30.70.330; -; 1.
DR HAMAP; MF_04001; PPV_E2; 1.
DR InterPro; IPR035975; E2/EBNA1_C_sf.
DR InterPro; IPR012677; Nucleotide-bd_a/b_plait_sf.
DR InterPro; IPR000427; Papillomavirus_E2_C.
DR InterPro; IPR001866; Papillomavirus_E2_N.
DR InterPro; IPR033668; Reg_prot_E2.
DR InterPro; IPR036050; Regulatory_protein_E2_N.
DR InterPro; IPR042503; Regulatory_protein_E2_N_1.
DR InterPro; IPR042504; Regulatory_protein_E2_N_2.
DR Pfam; PF00511; PPV_E2_C; 1.
DR Pfam; PF00508; PPV_E2_N; 1.
DR SUPFAM; SSF51332; SSF51332; 1.
DR SUPFAM; SSF54957; SSF54957; 1.
PE 3: Inferred from homology;
KW Activator; DNA replication; DNA-binding; Early protein; Host nucleus;
KW Isopeptide bond; Phosphoprotein; Repressor; Transcription;
KW Transcription regulation; Ubl conjugation.
FT CHAIN 1..514
FT /note="Regulatory protein E2"
FT /id="PRO_0000133183"
FT REGION 1..201
FT /note="Transactivation domain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04001"
FT REGION 196..424
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 430..514
FT /note="DNA-binding domain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04001"
FT COMPBIAS 196..244
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 252..282
FT /note="Basic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 283..314
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 330..362
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT CROSSLNK 437
FT /note="Glycyl lysine isopeptide (Lys-Gly) (interchain with
FT G-Cter in SUMO)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04001"
SQ SEQUENCE 514 AA; 57750 MW; F96549C131AACD56 CRC64;
MENLSERFNA LQDQLMNIYE AAEQTLQAQI KHWQTLRKEA VLLYYAREKG VTRLGYQPVP
VKAVSETKAK EAIAMVLQLE SLQTSDFAHE PWTLVDTSTE TFRSAPEGHF KKGPVPVEVI
YDNDPDNANL YTMWTYVYYM DADDKWHKAR SGVNHIGIYY LQGTFKNYYV LFADDAKRYG
TTGEWEVKVN KDTVFAPVTS STPPGSPGRQ ADTDTTAKTP TTSTTAVDST SRQLTTSKQP
QQTETRGRRY GRRPSSKSRR SQTQQRRSRS RHRSRSRSRS RSKSQTHTTW STTRSRSTSV
GKTRALTSRS RSRGRSPSTC RRGGGRSPRR RSRSPSTYSS CTTQRSQRAR AESPTTRGAR
GSRGSRGGSR GGRLRRRGRS SSSSSPAHKR SRGGSAKLRG VSPGEVGGSL RSVSSKHTGR
LGRLLEEARD PPVIIVKGAA NTLKYFRNRA KIKYTGLFRS FSTTWSWVAG DGTERLGRPR
MLISFSSYSQ RRDFDEAVRY PKGVDKAYGN LDSL
