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Protein

Regulatory protein E2

Gene

E2

Organism
Human papillomavirus type 5b
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Plays a role in the initiation of viral DNA replication. A dimer of E2 interacts with a dimer of E1 in order to improve specificity of E1 DNA binding activity. Once the complex recognizes and binds DNA at specific sites, the E2 dimer is removed from DNA. E2 also regulates viral transcription through binding to the E2RE response element (5'-ACCNNNNNNGGT-3') present in multiple copies in the regulatory regions of the viral genome. Activates or represses transcription depending on E2RE's position with regards to proximal promoter elements including the TATA-box. Repression occurs by sterically hindering the assembly of the transcription initiation complex.UniRule annotation

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionActivator, DNA-binding, Repressor
Biological processDNA replication, Transcription, Transcription regulation

Names & Taxonomyi

Protein namesi
Recommended name:
Regulatory protein E2UniRule annotation
Gene namesi
Name:E2UniRule annotation
OrganismiHuman papillomavirus type 5b
Taxonomic identifieri10599 [NCBI]
Taxonomic lineageiVirusesdsDNA viruses, no RNA stagePapillomaviridaeBetapapillomavirus
Virus hostiHomo sapiens (Human) [TaxID: 9606]
Proteomesi
  • UP000007669 Componenti: Genome

Subcellular locationi

  • Host nucleus UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Host nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001331831 – 514Regulatory protein E2Add BLAST514

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Cross-linki437Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO)UniRule annotation

Post-translational modificationi

Phosphorylated.UniRule annotation
Sumoylation plays a regulatory role in E2 transcriptional activity.UniRule annotation

Keywords - PTMi

Isopeptide bond, Phosphoprotein, Ubl conjugation

Expressioni

Keywords - Developmental stagei

Early protein

Interactioni

Subunit structurei

Binds DNA as homodimer. Interacts with protein E1; this interaction greatly increases E1 DNA-binding activity. Interacts with protein L1; this interaction enhances E2-dependent replication and transcription activation. Interacts with protein L2; this interaction inhibits E2 transcriptional activity but not DNA replication function E2. Interacts with protein E7; this interaction inhibits E7 oncogenic activity. Interacts with host TAF1; this interaction modulates E2-dependent transcriptional regulation. Interacts with host BRD4; this interaction mediates E2 transcriptional activation function. Additionally, the interaction with host BRD4 on mitotic chromosomes mediates tethering of the viral genome. Interacts with host TOPBP1; this interaction is required for optimal viral DNA replication.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliP26545.
SMRiP26545.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni1 – 201Transactivation domainUniRule annotationAdd BLAST201
Regioni430 – 514DNA-binding domainUniRule annotationAdd BLAST85

Sequence similaritiesi

Belongs to the papillomaviridae E2 protein family.UniRule annotation

Phylogenomic databases

OrthoDBiVOG0900010D.

Family and domain databases

HAMAPiMF_04001. PPV_E2. 1 hit.
InterProiView protein in InterPro
IPR035975. E2/EBNA1_C_sf.
IPR000427. Papillomavirus_E2_C.
IPR001866. Papillomavirus_E2_N.
IPR033668. Reg_prot_E2.
IPR036050. Regulatory_protein_E2_N.
PfamiView protein in Pfam
PF00511. PPV_E2_C. 1 hit.
PF00508. PPV_E2_N. 1 hit.
ProDomiView protein in ProDom or Entries sharing at least one domain
PD000672. E2_early_recog_prot_C. 1 hit.
SUPFAMiSSF51332. SSF51332. 1 hit.
SSF54957. SSF54957. 1 hit.

Sequencei

Sequence statusi: Complete.

P26545-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MENLSERFNA LQDQLMNIYE AAEQTLQAQI KHWQTLRKEA VLLYYAREKG
60 70 80 90 100
VTRLGYQPVP VKAVSETKAK EAIAMVLQLE SLQTSDFAHE PWTLVDTSTE
110 120 130 140 150
TFRSAPEGHF KKGPVPVEVI YDNDPDNANL YTMWTYVYYM DADDKWHKAR
160 170 180 190 200
SGVNHIGIYY LQGTFKNYYV LFADDAKRYG TTGEWEVKVN KDTVFAPVTS
210 220 230 240 250
STPPGSPGRQ ADTDTTAKTP TTSTTAVDST SRQLTTSKQP QQTETRGRRY
260 270 280 290 300
GRRPSSKSRR SQTQQRRSRS RHRSRSRSRS RSKSQTHTTW STTRSRSTSV
310 320 330 340 350
GKTRALTSRS RSRGRSPSTC RRGGGRSPRR RSRSPSTYSS CTTQRSQRAR
360 370 380 390 400
AESPTTRGAR GSRGSRGGSR GGRLRRRGRS SSSSSPAHKR SRGGSAKLRG
410 420 430 440 450
VSPGEVGGSL RSVSSKHTGR LGRLLEEARD PPVIIVKGAA NTLKYFRNRA
460 470 480 490 500
KIKYTGLFRS FSTTWSWVAG DGTERLGRPR MLISFSSYSQ RRDFDEAVRY
510
PKGVDKAYGN LDSL
Length:514
Mass (Da):57,750
Last modified:August 1, 1992 - v1
Checksum:iF96549C131AACD56
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
D90252 Genomic DNA. Translation: BAA14295.1.
PIRiB40480. W2WLB5.

Similar proteinsi

Entry informationi

Entry nameiVE2_HPV5B
AccessioniPrimary (citable) accession number: P26545
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: August 1, 1992
Last modified: November 22, 2017
This is version 90 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families