E1B55_ADECT
ID E1B55_ADECT Reviewed; 444 AA.
AC P14266; P90264;
DT 01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-2005, sequence version 2.
DT 23-FEB-2022, entry version 57.
DE RecName: Full=E1B 55 kDa protein;
DE Short=E1B-55K;
DE AltName: Full=E1B protein, large T-antigen;
DE AltName: Full=E1B-495R;
OS Canine adenovirus serotype 2 (strain Toronto A 26-61) (CAdV-2) (Canine
OS adenovirus 2 (strain Toronto A 26-61)).
OC Viruses; Varidnaviria; Bamfordvirae; Preplasmiviricota; Tectiliviricetes;
OC Rowavirales; Adenoviridae; Mastadenovirus; Canine mastadenovirus A.
OX NCBI_TaxID=69152;
OH NCBI_TaxID=9615; Canis lupus familiaris (Dog) (Canis familiaris).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=2800332; DOI=10.1016/0042-6822(89)90188-8;
RA Shibata R., Shinagawa M., Iida Y., Tsukiyama T.;
RT "Nucleotide sequence of E1 region of canine adenovirus type 2.";
RL Virology 172:460-467(1989).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA Campbell J.B., Zhao Y.;
RT "Complete DNA sequence and genomic organization of canine adenovirus type
RT 2.";
RL Submitted (DEC-1996) to the EMBL/GenBank/DDBJ databases.
RN [3]
RP GENOME ANNOTATION.
RX PubMed=14573794; DOI=10.1099/vir.0.19497-0;
RA Davison A.J., Benko M., Harrach B.;
RT "Genetic content and evolution of adenoviruses.";
RL J. Gen. Virol. 84:2895-2908(2003).
CC -!- FUNCTION: Plays a major role to prevent cellular inhibition of viral
CC genome replication. Assembles an SCF-like E3 ubiquitin ligase complex
CC based on the cellular proteins ELOB, ELOC, CUL5 and RBX1, in
CC cooperation with viral E4orf6. This viral RING-type ligase
CC ubiquitinates cellular substrates and targets them to proteasomal
CC degradation: TP53/p53, LIG4, MRE11-RAD50-NBS1 (MRN) complex, ITGA3,
CC DAXX and BLM. Degradation of host TP53/p53 activity is essential for
CC preventing E1A-induced TP53 accumulation that would otherwise lead to
CC cell apoptosis and growth arrest. E1B-55K also inactivates TP53
CC transcription-factor activity by binding its transactivation domain.
CC E1B-55K also functions as a SUMO1 E3 ligase for TP53 which causes the
CC latter to be sequestered in promyelocytic leukemia (PML) nuclear bodies
CC thereby contributing to maximal inhibition of TP53 function.
CC {ECO:0000250|UniProtKB:P03243}.
CC -!- SUBUNIT: Interacts with the transactivation domain of TP53 (via N-
CC terminus); this interaction leads to the inhibition of TP53 function
CC and/or its degradation. Interacts with host PML-4 and PML-5; this
CC interaction promotes efficient subnuclear targeting of E1B-55K to PML
CC nuclear bodies. Interacts with E4-ORF3 protein. Interacts with E4-ORF6
CC protein. Interacts with host DAXX protein; this interaction might
CC alterate the normal interactions of DAXX, PML, and p53, which may
CC contribute to cell transformation. {ECO:0000250|UniProtKB:P03243,
CC ECO:0000250|UniProtKB:P03244}.
CC -!- SUBCELLULAR LOCATION: Host nucleus {ECO:0000250|UniProtKB:P03243}. Host
CC cytoplasm {ECO:0000250|UniProtKB:P03243}. Note=Colocalizes with host
CC TP53 to host PML nuclear bodies. PML localization of E1B-55K is
CC necessary for E1B-55K-dependent SUMOylation of TP53.
CC {ECO:0000250|UniProtKB:P03243}.
CC -!- DOMAIN: Contains a PML interaction motif that allows the subnuclear PML
CC localization. {ECO:0000250|UniProtKB:P03243}.
CC -!- SIMILARITY: Belongs to the adenoviridae E1B 55 kDa protein family.
CC {ECO:0000305}.
CC -!- SEQUENCE CAUTION:
CC Sequence=AAA42472.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; J04368; AAA42472.1; ALT_INIT; Genomic_DNA.
DR EMBL; U77082; AAB38713.1; -; Genomic_DNA.
DR PIR; C34165; ERADC2.
DR RefSeq; AP_000610.1; AC_000020.1.
DR SMR; P14266; -.
DR GO; GO:0030430; C:host cell cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0039526; P:modulation by virus of host apoptotic process; IEA:UniProtKB-KW.
DR InterPro; IPR002612; Adeno_E1B_55kDa.
DR InterPro; IPR011050; Pectin_lyase_fold/virulence.
DR Pfam; PF01696; Adeno_E1B_55K; 1.
DR SUPFAM; SSF51126; SSF51126; 1.
PE 3: Inferred from homology;
KW Early protein; Host cytoplasm; Host nucleus; Host-virus interaction;
KW Modulation of host cell apoptosis by virus.
FT CHAIN 1..444
FT /note="E1B 55 kDa protein"
FT /id="PRO_0000221732"
FT REGION 1..35
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 1..17
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 444 AA; 49554 MW; DA05E01A7BDF18F7 CRC64;
MEQNADMEPD RQVNQRPPRF RARGAGVRGR GRVRRSAFSR GQRRPIIRVD DLQLPDPLYV
MQALQRDHTL EMPRGQVDFS WIEAEERRVG PTDEWYFEAV KTYKAKPGDD LQTIIKNYAK
ISLECGAVYE INSKIRVTGA CYIIGNCAVL RPNLPAGEAM FEVLNVDFIP SIGFMERIVF
SNVIFDCRTT ATVVCCISER NTLFHNCVFS GPHMLCLDLR AGAEVRGCHF VGAVCALRSK
GLYSIRVKNS IFEKCAFGVV TGSKASISHC MFKDCTCSIM LGGQGTIAHS QFIVTTSAEA
PMNLQLCTCE GNGSHVVPLG NIHFASHREA SWPTFYANTL VRVRLYMGRR RGVFHPKQST
LSMCVIAAPR GVVQRIYLFG VYDATCAIMQ LGEAGNAASE RLCTCGFRHS TPSLRATYVT
DTRIDRELNS QDTAEFFSSD EDNF