ID   CAPSD_SIRV1             Reviewed;         134 AA.
AC   Q8QL36; Q5TJA0;
DT   01-JUL-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2002, sequence version 1.
DT   23-FEB-2022, entry version 40.
DE   RecName: Full=Putative capsid protein;
GN   ORFNames=134;
OS   Sulfolobus islandicus rod-shaped virus 1 (SIRV-1) (Sulfolobus virus
OS   SIRV-1).
OC   Viruses; Adnaviria; Zilligvirae; Taleaviricota; Tokiviricetes;
OC   Ligamenvirales; Rudiviridae; Icerudivirus; Icerudivirus SIRV1.
OX   NCBI_TaxID=157898;
OH   NCBI_TaxID=43080; Sulfolobus islandicus.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Isolate variant VIII;
RX   PubMed=11878892; DOI=10.1006/viro.2001.1190;
RA   Peng X., Blum H., She Q., Mallok S., Bruegger K., Garrett R.A., Zillig W.,
RA   Prangishvili D.;
RT   "Sequences and replication of genomes of the archaeal rudiviruses SIRV1 and
RT   SIRV2: relationships to the archaeal lipothrixvirus SIFV and some eukaryal
RT   viruses.";
RL   Virology 291:226-234(2001).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Isolate variant XX;
RX   PubMed=15469509; DOI=10.1111/j.1365-2958.2004.04287.x;
RA   Peng X., Kessler A., Phan H., Garrett R.A., Prangishvili D.;
RT   "Multiple variants of the archaeal DNA rudivirus SIRV1 in a single host and
RT   a novel mechanism of genomic variation.";
RL   Mol. Microbiol. 54:366-375(2004).
CC   -!- FUNCTION: Self-assembles to form a helical, filamentous nucleocapsid.
CC       The capsid proteins wrap around the DNA and maintain it in an A-form by
CC       non-specific desolvation and specific coordination of the DNA phosphate
CC       groups by positively charged residues. This certainly protects the
CC       viral DNA under conditions such as the extreme desiccation of its host.
CC       {ECO:0000250|UniProtKB:A0A6M3VXD3}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:A0A6M3VXD3}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:A0A6M3VXD3}.
CC   -!- DOMAIN: The N-terminus projects into a DNA groove.
CC       {ECO:0000250|UniProtKB:A0A6M3VXD3}.
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DR   EMBL; AJ414696; CAC93974.1; -; Genomic_DNA.
DR   EMBL; AJ748296; CAG38838.1; -; Genomic_DNA.
DR   RefSeq; NP_666607.1; NC_004087.1.
DR   SMR; Q8QL36; -.
DR   GeneID; 951362; -.
DR   KEGG; vg:951362; -.
DR   Proteomes; UP000002270; Genome.
DR   Proteomes; UP000223181; Genome.
DR   GO; GO:0019029; C:helical viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   InterPro; IPR022014; Sulfobus_virus_coat_C.
DR   Pfam; PF12193; Sulf_coat_C; 1.
PE   3: Inferred from homology;
KW   Capsid protein; DNA-binding; Helical capsid protein; Reference proteome;
KW   Virion.
FT   CHAIN           1..134
FT                   /note="Putative capsid protein"
FT                   /id="PRO_0000342289"
SQ   SEQUENCE   134 AA;  14388 MW;  4539CD4E102372E7 CRC64;
     MAKGHTKRSY SQRYAKWQAK FNAFSNPTVA STILSNVAPV AQQNFQTNVP TFTAVNENVS
     AVLSQYGITG PNRAIYQGFG LKIARALNRI GSGPALVNMI NGLKSYYISA FNANPQVLDA
     VVNIITGSPT GYVS