ID   MP2_MCMVK               Reviewed;          64 AA.
AC   A0A131KVX9;
DT   25-MAY-2022, integrated into UniProtKB/Swiss-Prot.
DT   11-MAY-2016, sequence version 1.
DT   03-AUG-2022, entry version 10.
DE   RecName: Full=p7b {ECO:0000303|PubMed:27242072};
GN   ORFNames=ORF4 {ECO:0000305};
OS   Maize chlorotic mottle virus (isolate United States/Kansas/1987) (MCMV).
OC   Viruses; Riboviria; Orthornavirae; Kitrinoviricota; Tolucaviricetes;
OC   Tolivirales; Tombusviridae; Procedovirinae; Machlomovirus.
OX   NCBI_TaxID=882210;
OH   NCBI_TaxID=4577; Zea mays (Maize).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RC   STRAIN=Isolate United States/Kansas/1987;
RX   PubMed=2726455; DOI=10.1093/nar/17.8.3163;
RA   Nutter R.C., Scheets K., Panganiban L.C., Lommel S.A.;
RT   "The complete nucleotide sequence of the maize chlorotic mottle virus
RT   genome.";
RL   Nucleic Acids Res. 17:3163-3177(1989).
RN   [2]
RP   IDENTIFICATION.
RX   PubMed=2212985; DOI=10.1099/0022-1317-71-9-1887;
RA   Riviere C.J., Rochon D.M.;
RT   "Nucleotide sequence and genomic organization of melon necrotic spot
RT   virus.";
RL   J. Gen. Virol. 71:1887-1896(1990).
RN   [3]
RP   FUNCTION.
RX   PubMed=27242072; DOI=10.1016/j.virusres.2016.04.024;
RA   Scheets K.;
RT   "Analysis of gene functions in Maize chlorotic mottle virus.";
RL   Virus Res. 222:71-79(2016).
CC   -!- FUNCTION: Required for cell-to-cell movement of virions in the host
CC       plant together with p7a. {ECO:0000269|PubMed:27242072}.
CC   -!- SUBCELLULAR LOCATION: Host endoplasmic reticulum membrane
CC       {ECO:0000250|UniProtKB:Q89846}; Single-pass type II membrane protein
CC       {ECO:0000250|UniProtKB:Q89846}.
CC   -!- SIMILARITY: Belongs to the gammacarmovirus double gene block protein 2
CC       family. {ECO:0000305}.
CC   -!- CAUTION: This sequence initiates at a non-canonical CTG leucine codon.
CC       {ECO:0000305}.
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DR   EMBL; X14736; CZQ76687.1; -; Genomic_RNA.
DR   RefSeq; YP_009237216.1; NC_003627.1.
DR   GeneID; 2652941; -.
DR   Proteomes; UP000007071; Genome.
DR   GO; GO:0044167; C:host cell endoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0046740; P:transport of virus in host, cell to cell; IEA:UniProtKB-KW.
PE   3: Inferred from homology;
KW   Host endoplasmic reticulum; Host membrane; Membrane; Reference proteome;
KW   Signal-anchor; Transmembrane; Transmembrane helix; Transport;
KW   Viral movement protein.
FT   CHAIN           1..64
FT                   /note="p7b"
FT                   /id="PRO_0000455297"
FT   TOPO_DOM        1..12
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000250|UniProtKB:Q89846"
FT   TRANSMEM        13..30
FT                   /note="Helical; Signal-anchor for type II membrane protein"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        31..64
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000250|UniProtKB:Q89846"
SQ   SEQUENCE   64 AA;  7322 MW;  5E747935E0E928F7 CRC64;
     MECVCVDSSW PQWLRNLILG ILISSILFIL TKTQDTVAVY HEPSVYSIDQ TQKFQKIDIH
     NGGK