ID   GAG_MLVFF               Reviewed;         538 AA.
AC   P26806;
DT   01-AUG-1992, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   27-MAR-2024, entry version 134.
DE   RecName: Full=Gag polyprotein;
DE   AltName: Full=Core polyprotein;
DE   Contains:
DE     RecName: Full=Matrix protein p15;
DE   Contains:
DE     RecName: Full=RNA-binding phosphoprotein p12;
DE     AltName: Full=pp12;
DE   Contains:
DE     RecName: Full=Capsid protein p30;
DE   Contains:
DE     RecName: Full=Nucleocapsid protein p10-Gag;
DE              Short=NC-gag;
GN   Name=gag;
OS   Friend murine leukemia virus (isolate FB29) (FrMLV).
OC   Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC   Ortervirales; Retroviridae; Orthoretrovirinae; Gammaretrovirus;
OC   Murine leukemia virus.
OX   NCBI_TaxID=11797;
OH   NCBI_TaxID=10090; Mus musculus (Mouse).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1762923; DOI=10.1093/nar/19.24.6950;
RA   Perryman S., Nishio J., Chesebro B.;
RT   "Complete nucleotide sequence of Friend murine leukemia virus, strain
RT   FB29.";
RL   Nucleic Acids Res. 19:6950-6950(1991).
RN   [2]
RP   PROTEIN SEQUENCE OF 479-512.
RX   PubMed=6267042; DOI=10.1016/s0021-9258(19)68857-5;
RA   Henderson L.E., Copeland T.D., Sowder R.C., Smythers G.W., Oroszlan S.;
RT   "Primary structure of the low molecular weight nucleic acid-binding
RT   proteins of murine leukemia viruses.";
RL   J. Biol. Chem. 256:8400-8406(1981).
CC   -!- FUNCTION: [Gag polyprotein]: Plays a role in budding and is processed
CC       by the viral protease during virion maturation outside the cell. During
CC       budding, it recruits, in a PPXY-dependent or independent manner, Nedd4-
CC       like ubiquitin ligases that conjugate ubiquitin molecules to Gag, or to
CC       Gag binding host factors. Interaction with HECT ubiquitin ligases
CC       probably links the viral protein to the host ESCRT pathway and
CC       facilitates release. {ECO:0000250|UniProtKB:P03332}.
CC   -!- FUNCTION: [Matrix protein p15]: Targets Gag and gag-pol polyproteins to
CC       the plasma membrane via a multipartite membrane binding signal, that
CC       includes its myristoylated N-terminus. Also mediates nuclear
CC       localization of the pre-integration complex.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- FUNCTION: [RNA-binding phosphoprotein p12]: Constituent of the pre-
CC       integration complex (PIC) which tethers the latter to mitotic
CC       chromosomes. {ECO:0000250|UniProtKB:P03332}.
CC   -!- FUNCTION: [Capsid protein p30]: Forms the spherical core of the virion
CC       that encapsulates the genomic RNA-nucleocapsid complex.
CC       {ECO:0000250|UniProtKB:P03336}.
CC   -!- FUNCTION: [Nucleocapsid protein p10-Gag]: Involved in the packaging and
CC       encapsidation of two copies of the genome. Binds with high affinity to
CC       conserved UCUG elements within the packaging signal, located near the
CC       5'-end of the genome. This binding is dependent on genome dimerization.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- SUBUNIT: [Capsid protein p30]: Homohexamer; further associates as
CC       homomultimer (By similarity). The virus core is composed of a lattice
CC       formed from hexagonal rings, each containing six capsid monomers.
CC       Interacts with mouse UBE2I and mouse PIAS4.
CC       {ECO:0000250|UniProtKB:P03332, ECO:0000250|UniProtKB:P03336}.
CC   -!- SUBUNIT: [Gag polyprotein]: Interacts (via PPXY motif) with host NEDD4.
CC       Interacts (via PSAP motif) with host TSG101. Interacts (via LYPX(n)L
CC       motif) with host PDCD6IP. {ECO:0000250|UniProtKB:P03332}.
CC   -!- SUBCELLULAR LOCATION: [Gag polyprotein]: Virion
CC       {ECO:0000250|UniProtKB:P03332}. Host cell membrane
CC       {ECO:0000250|UniProtKB:P03332}; Lipid-anchor
CC       {ECO:0000250|UniProtKB:P03332}. Host endosome, host multivesicular body
CC       {ECO:0000250|UniProtKB:P26807}.
CC   -!- SUBCELLULAR LOCATION: [Matrix protein p15]: Virion
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- SUBCELLULAR LOCATION: [Capsid protein p30]: Virion
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- SUBCELLULAR LOCATION: [Nucleocapsid protein p10-Gag]: Virion
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- SUBCELLULAR LOCATION: [RNA-binding phosphoprotein p12]: Host cytoplasm
CC       {ECO:0000250|UniProtKB:P03332}. Note=Localizes to the host cytoplasm
CC       early in infection and binds to the mitotic chromosomes later on.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- ALTERNATIVE PRODUCTS:
CC       Event=Alternative initiation; Named isoforms=2;
CC       Name=Gag polyprotein;
CC         IsoId=P26806-1; Sequence=Displayed;
CC       Name=Glyco-Gag protein;
CC         IsoId=P0DOH5-1; Sequence=External;
CC   -!- DOMAIN: [Gag polyprotein]: Late-budding domains (L domains) are short
CC       sequence motifs essential for viral particle budding. They recruit
CC       proteins of the host ESCRT machinery (Endosomal Sorting Complex
CC       Required for Transport) or ESCRT-associated proteins. RNA-binding
CC       phosphoprotein p12 contains one L domain: a PPXY motif which interacts
CC       with the WW domain 3 of NEDD4 E3 ubiquitin ligase. PPXY motif is
CC       essential for virus egress. Matrix protein p15 contains one L domain: a
CC       PTAP/PSAP motif, which interacts with the UEV domain of TSG101. The
CC       junction between the matrix protein p15 and RNA-binding phosphoprotein
CC       p12 also contains one L domain: a LYPX(n)L motif which interacts with
CC       PDCD6IP. Both PSAP and LYPX(n)L domains might play little to no role in
CC       budding and possibly drive residual virus release.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- PTM: [Gag polyprotein]: Ubiquitinated by ITCH. Gag can recruit the
CC       ubiquitin ligase Itch in an L domain-independent manner to facilitate
CC       virus release via a mechanism that involves Gag ubiquitination.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- PTM: [Gag polyprotein]: Specific enzymatic cleavages by the viral
CC       protease yield mature proteins. The protease is released by
CC       autocatalytic cleavage. The polyprotein is cleaved during and after
CC       budding, this process is termed maturation.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- PTM: [Capsid protein p30]: Sumoylated; required for virus replication.
CC       {ECO:0000250|UniProtKB:P03332}.
CC   -!- PTM: RNA-binding phosphoprotein p12 is phosphorylated on serine
CC       residues. {ECO:0000250|UniProtKB:P03332}.
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DR   EMBL; Z11128; CAA77478.1; -; Genomic_DNA.
DR   PIR; S70394; S70394.
DR   RefSeq; NP_040332.1; NC_001362.1.
DR   SMR; P26806; -.
DR   DIP; DIP-61620N; -.
DR   ELM; P26806; -.
DR   IntAct; P26806; 1.
DR   GeneID; 1491876; -.
DR   KEGG; vg:1491876; -.
DR   Proteomes; UP000008877; Segment.
DR   GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0072494; C:host multivesicular body; IEA:UniProtKB-SubCell.
DR   GO; GO:0016020; C:membrane; IEA:UniProtKB-KW.
DR   GO; GO:0019013; C:viral nucleocapsid; IEA:UniProtKB-KW.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0039660; F:structural constituent of virion; IEA:UniProtKB-KW.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   GO; GO:0039702; P:viral budding via host ESCRT complex; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.150.180; Gamma-retroviral matrix domain; 1.
DR   Gene3D; 1.10.375.10; Human Immunodeficiency Virus Type 1 Capsid Protein; 1.
DR   Gene3D; 4.10.60.10; Zinc finger, CCHC-type; 1.
DR   InterPro; IPR000840; G_retro_matrix.
DR   InterPro; IPR036946; G_retro_matrix_sf.
DR   InterPro; IPR002079; Gag_p12.
DR   InterPro; IPR003036; Gag_P30.
DR   InterPro; IPR008919; Retrov_capsid_N.
DR   InterPro; IPR010999; Retrovr_matrix.
DR   InterPro; IPR001878; Znf_CCHC.
DR   InterPro; IPR036875; Znf_CCHC_sf.
DR   PANTHER; PTHR33166:SF1; CORE SHELL PROTEIN GAG P30 DOMAIN-CONTAINING PROTEIN; 1.
DR   PANTHER; PTHR33166; GAG_P30 DOMAIN-CONTAINING PROTEIN; 1.
DR   Pfam; PF01140; Gag_MA; 1.
DR   Pfam; PF01141; Gag_p12; 1.
DR   Pfam; PF02093; Gag_p30; 1.
DR   Pfam; PF00098; zf-CCHC; 1.
DR   SMART; SM00343; ZnF_C2HC; 1.
DR   SUPFAM; SSF47836; Retroviral matrix proteins; 1.
DR   SUPFAM; SSF47943; Retrovirus capsid protein, N-terminal core domain; 1.
DR   SUPFAM; SSF57756; Retrovirus zinc finger-like domains; 1.
DR   PROSITE; PS50158; ZF_CCHC; 1.
PE   1: Evidence at protein level;
KW   Alternative initiation; Capsid protein; Coiled coil;
KW   Direct protein sequencing; Host cell membrane; Host cytoplasm;
KW   Host endosome; Host membrane; Host-virus interaction; Lipoprotein;
KW   Membrane; Metal-binding; Myristate; Phosphoprotein; RNA-binding;
KW   Ubl conjugation; Viral budding; Viral budding via the host ESCRT complexes;
KW   Viral matrix protein; Viral nucleoprotein; Viral release from host cell;
KW   Virion; Zinc; Zinc-finger.
FT   INIT_MET        1
FT                   /note="Removed; by host"
FT                   /evidence="ECO:0000255"
FT   CHAIN           2..538
FT                   /note="Gag polyprotein"
FT                   /id="PRO_0000390812"
FT   CHAIN           2..131
FT                   /note="Matrix protein p15"
FT                   /id="PRO_0000040900"
FT   CHAIN           132..215
FT                   /note="RNA-binding phosphoprotein p12"
FT                   /id="PRO_0000040901"
FT   CHAIN           216..478
FT                   /note="Capsid protein p30"
FT                   /id="PRO_0000040902"
FT   CHAIN           479..538
FT                   /note="Nucleocapsid protein p10-Gag"
FT                   /id="PRO_0000040903"
FT   ZN_FING         502..519
FT                   /note="CCHC-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00047"
FT   REGION          110..218
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          345..393
FT                   /note="Interaction with host PIAS4"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   REGION          430..435
FT                   /note="Interaction with host UBE2I"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   REGION          434..538
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COILED          438..478
FT                   /evidence="ECO:0000255"
FT   MOTIF           111..114
FT                   /note="PTAP/PSAP motif"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   MOTIF           130..134
FT                   /note="LYPX(n)L motif"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   MOTIF           162..165
FT                   /note="PPXY motif"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   COMPBIAS        110..127
FT                   /note="Pro residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        128..143
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        434..476
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        488..523
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   SITE            131..132
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   SITE            215..216
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   SITE            478..479
FT                   /note="Cleavage; by viral protease"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   MOD_RES         192
FT                   /note="Phosphoserine; by host"
FT                   /evidence="ECO:0000250|UniProtKB:P03332"
FT   LIPID           2
FT                   /note="N-myristoyl glycine; by host"
FT                   /evidence="ECO:0000255"
FT   CONFLICT        501
FT                   /note="H -> R (in Ref. 2; AA sequence)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   538 AA;  60929 MW;  2E652DDB9E0D4A3C CRC64;
     MGQAVTTPLS LTLDHWKDVE RTAHNLSVEV RKRRWVTFCS AEWPTFNVGW PRDGTFNPDI
     ITQVKIKVFS PGPHGHPDQV PYIVTWEAIA VDPPPWVRPF VHPKPPLSLP PSAPSLPPEP
     PLSTPPQSSL YPALTSPLNT KPRPQVLPDS GGPLIDLLTE DPPPYRDPGP PSPDGNGDSG
     EVAPTEGAPD PSPMVSRLRG RKEPPVADST TSQAFPLRLG GNGQYQYWPF SSSDLYNWKN
     NNPSFSEDPA KLTALIESVL LTHQPTWDDC QQLLGTLLTG EEKQRVLLEA RKAVRGEDGR
     PTQLPNDIND AFPLERPDWD YNTQRGRNHL VHYRQLLLAG LQNAGRSPTN LAKVKGITQG
     PNESPSAFLE RLKEAYRRYT PYDPEDPGQE TNVAMSFIWQ SAPDIGRKLE RLEDLKSKTL
     GDLVREAEKI FNKRETPEER EERIRRETEE KEERRRAEDV QREKERDRRR HREMSKLLAT
     VVSGQRQDRQ GGERRRPQLD HDQCAYCKEK GHWARDCPKK PRGPRGPRPQ ASLLTLDD
//