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PRO_HTL3P
ID   PRO_HTL3P               Reviewed;         584 AA.
AC   Q09SZ9;
DT   28-NOV-2006, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 68.
DE   RecName: Full=Gag-Pro polyprotein;
DE   AltName: Full=Pr76Gag-Pro;
DE   Contains:
DE     RecName: Full=Matrix protein p19;
DE              Short=MA;
DE   Contains:
DE     RecName: Full=Capsid protein p24;
DE              Short=CA;
DE   Contains:
DE     RecName: Full=Nucleocapsid protein p15-pro;
DE              Short=NC';
DE              Short=NC-pro;
DE   Contains:
DE     RecName: Full=Protease;
DE              Short=PR;
DE              EC=3.4.23.-;
DE   Contains:
DE     RecName: Full=p1;
DE   Contains:
DE     RecName: Full=Transframe peptide;
DE              Short=TFP;
DE     AltName: Full=p8;
DE     AltName: Full=pX;
GN   Name=gag-pro;
OS   Human T-cell leukemia virus 3 (strain Pyl43) (HTLV-3).
OC   Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC   Ortervirales; Retroviridae; Orthoretrovirinae; Deltaretrovirus.
OX   NCBI_TaxID=406769;
OH   NCBI_TaxID=9606; Homo sapiens (Human).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=16973592; DOI=10.1128/jvi.00799-06;
RA   Calattini S., Chevalier S.A., Duprez R., Afonso P., Froment A., Gessain A.,
RA   Mahieux R.;
RT   "Human T-cell lymphotropic virus type 3: complete nucleotide sequence and
RT   characterization of the human tax3 protein.";
RL   J. Virol. 80:9876-9888(2006).
CC   -!- FUNCTION: Matrix protein p19 targets Gag, Gag-Pro and Gag-Pro-Pol
CC       polyproteins to the plasma membrane via a multipartite membrane binding
CC       signal, that includes its myristoylated N-terminus. Also mediates
CC       nuclear localization of the preintegration complex (By similarity).
CC       {ECO:0000250}.
CC   -!- FUNCTION: Capsid protein p24 forms the conical core of the virus that
CC       encapsulates the genomic RNA-nucleocapsid complex. {ECO:0000250}.
CC   -!- FUNCTION: Nucleocapsid protein p15 is involved in the packaging and
CC       encapsidation of two copies of the genome. {ECO:0000250}.
CC   -!- FUNCTION: The aspartyl protease mediates proteolytic cleavages of Gag,
CC       Gag-Pro and Gag-Pro-Pol polyproteins during or shortly after the
CC       release of the virion from the plasma membrane. Cleavages take place as
CC       an ordered, step-wise cascade to yield mature proteins. This process is
CC       called maturation. Displays maximal activity during the budding process
CC       just prior to particle release from the cell. Hydrolyzes host EIF4GI in
CC       order to shut off the capped cellular mRNA translation. The resulting
CC       inhibition of cellular protein synthesis serves to ensure maximal viral
CC       gene expression and to evade host immune response (By similarity).
CC       {ECO:0000250}.
CC   -!- SUBUNIT: Interacts with human TSG101. This interaction is essential for
CC       budding and release of viral particles (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: [Matrix protein p19]: Virion {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: [Capsid protein p24]: Virion {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: [Nucleocapsid protein p15-pro]: Virion
CC       {ECO:0000305}.
CC   -!- ALTERNATIVE PRODUCTS:
CC       Event=Ribosomal frameshifting; Named isoforms=3;
CC         Comment=This strategy of translation probably allows the virus to
CC         modulate the quantity of each viral protein.;
CC       Name=Gag-Pro polyprotein;
CC         IsoId=Q09SZ9-1; Sequence=Displayed;
CC       Name=Gag polyprotein;
CC         IsoId=Q09T00-1; Sequence=External;
CC       Name=Gag-Pol polyprotein;
CC         IsoId=Q4U0X6-1; Sequence=External;
CC   -!- DOMAIN: Late-budding domains (L domains) are short sequence motifs
CC       essential for viral particle release. They can occur individually or in
CC       close proximity within structural proteins. They interacts with sorting
CC       cellular proteins of the multivesicular body (MVB) pathway. Most of
CC       these proteins are class E vacuolar protein sorting factors belonging
CC       to ESCRT-I, ESCRT-II or ESCRT-III complexes. Matrix protein p19
CC       contains two L domains: a PTAP/PSAP motif which interacts with the UEV
CC       domain of TSG101, and a PPXY motif which binds to the WW domains of
CC       HECT (homologous to E6-AP C-terminus) E3 ubiquitin ligases (By
CC       similarity). {ECO:0000250}.
CC   -!- DOMAIN: The capsid protein N-terminus seems to be involved in Gag-Gag
CC       interactions. {ECO:0000250}.
CC   -!- PTM: Specific enzymatic cleavages by the viral protease yield mature
CC       proteins. The polyprotein is cleaved during and after budding, this
CC       process is termed maturation. The protease is autoproteolytically
CC       processed at its N- and C-termini (By similarity). {ECO:0000250}.
CC   -!- MISCELLANEOUS: [Isoform Gag-Pro polyprotein]: Produced by -1 ribosomal
CC       frameshifting at the gag-pro genes boundary.
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DR   EMBL; DQ462191; ABF18960.1; ALT_SEQ; Genomic_DNA.
DR   SMR; Q09SZ9; -.
DR   Proteomes; UP000007684; Genome.
DR   GO; GO:0019013; C:viral nucleocapsid; IEA:UniProtKB-KW.
DR   GO; GO:0004190; F:aspartic-type endopeptidase activity; IEA:UniProtKB-KW.
DR   GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR   GO; GO:0005198; F:structural molecule activity; IEA:InterPro.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR   GO; GO:0039657; P:suppression by virus of host gene expression; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.1200.30; -; 1.
DR   Gene3D; 1.10.375.10; -; 1.
DR   Gene3D; 2.40.70.10; -; 1.
DR   InterPro; IPR001969; Aspartic_peptidase_AS.
DR   InterPro; IPR003139; D_retro_matrix.
DR   InterPro; IPR045345; Gag_p24_C.
DR   InterPro; IPR000721; Gag_p24_N.
DR   InterPro; IPR001995; Peptidase_A2_cat.
DR   InterPro; IPR021109; Peptidase_aspartic_dom_sf.
DR   InterPro; IPR018061; Retropepsins.
DR   InterPro; IPR008916; Retrov_capsid_C.
DR   InterPro; IPR008919; Retrov_capsid_N.
DR   InterPro; IPR010999; Retrovr_matrix.
DR   InterPro; IPR001878; Znf_CCHC.
DR   InterPro; IPR036875; Znf_CCHC_sf.
DR   Pfam; PF02228; Gag_p19; 1.
DR   Pfam; PF00607; Gag_p24; 1.
DR   Pfam; PF19317; Gag_p24_C; 1.
DR   Pfam; PF00077; RVP; 1.
DR   Pfam; PF00098; zf-CCHC; 1.
DR   SMART; SM00343; ZnF_C2HC; 2.
DR   SUPFAM; SSF47836; SSF47836; 1.
DR   SUPFAM; SSF47943; SSF47943; 1.
DR   SUPFAM; SSF50630; SSF50630; 1.
DR   SUPFAM; SSF57756; SSF57756; 1.
DR   PROSITE; PS50175; ASP_PROT_RETROV; 1.
DR   PROSITE; PS00141; ASP_PROTEASE; 1.
DR   PROSITE; PS50158; ZF_CCHC; 1.
PE   3: Inferred from homology;
KW   Aspartyl protease; Capsid protein;
KW   Eukaryotic host gene expression shutoff by virus;
KW   Eukaryotic host translation shutoff by virus;
KW   Host gene expression shutoff by virus; Host-virus interaction; Hydrolase;
KW   Lipoprotein; Metal-binding; Myristate; Protease; Repeat;
KW   Ribosomal frameshifting; Viral nucleoprotein; Virion; Zinc; Zinc-finger.
FT   INIT_MET        1
FT                   /note="Removed; by host"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..584
FT                   /note="Gag-Pro polyprotein"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260480"
FT   CHAIN           2..123
FT                   /note="Matrix protein p19"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260481"
FT   CHAIN           124..337
FT                   /note="Capsid protein p24"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260482"
FT   CHAIN           338..430
FT                   /note="Nucleocapsid protein p15-pro"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260483"
FT   CHAIN           431..553
FT                   /note="Protease"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260484"
FT   PEPTIDE         554..561
FT                   /note="p1"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260485"
FT   CHAIN           562..584
FT                   /note="Transframe peptide"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000260486"
FT   DOMAIN          457..535
FT                   /note="Peptidase A2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00275"
FT   ZN_FING         349..366
FT                   /note="CCHC-type 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00047"
FT   ZN_FING         372..389
FT                   /note="CCHC-type 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00047"
FT   REGION          93..117
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          564..584
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOTIF           98..101
FT                   /note="PTAP/PSAP motif"
FT   MOTIF           109..112
FT                   /note="PPXY motif"
FT   COMPBIAS        95..117
FT                   /note="Pro residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        462
FT                   /note="For protease activity; shared with dimeric partner"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10094"
FT   SITE            123..124
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250"
FT   SITE            337..338
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250"
FT   SITE            430..431
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250"
FT   SITE            553..554
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250"
FT   SITE            561..562
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250"
FT   LIPID           2
FT                   /note="N-myristoyl glycine; by host"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   584 AA;  64519 MW;  DB0109FF41AA2C3B CRC64;
     MGKTYSSPVN PIPKAPKGLA IHHWLNFLQA AYRLQPGPSE FDFHQLRKFL KLAIKTPVWL
     NPINYSVLAR LIPKNYPGRV HEIVAILIQE TPAREAPPSA PPADDPQKPP PYPEHAQVEP
     QCLPVLHPHG APATHRPWQM KDLQAIKQEV SSSAPGSPQF MQTVRLAVQQ FDPTAKDLHD
     LLQYLCSSLV ASLHHQQLET LIAQAETQGI TGYNPLAGPL RVQANNPNQQ GLRREYQNLW
     LSAFSALPGN TKDPTWAAIL QGPEEPFCSF VERLNVALDN GLPEGTPKDP ILRSLAYSNA
     NKECQKLLQA RGQTNSPLGE MLRACQTWTP RDKNKILMIQ PKKTPPPNQP CFRCGQAGHW
     SRDCKQPRPP PGPCPLCQDP AHWKQDCPQL KADTKGSEDL LLDLPCEASH VRERKNLLRG
     GGLTSPRTIL PLIPLSQQRQ PILHVQVSFS NTSPVGVQAL LDTGADITVL PAYLCPPDSN
     LQDTTVLGAG GPSTSKFKIL PRPVHIHLPF RKQPVTLTSC LIDTNDQWTI LGRDALQQCQ
     SSLYLADQPS SVLPVQTPKL IGLEHLPPPP EVSQFPLNRS ASRP
 
 
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