ID   CAHH_VARV               Reviewed;         304 AA.
AC   P0DSY2; P33065;
DT   16-OCT-2019, integrated into UniProtKB/Swiss-Prot.
DT   16-OCT-2019, sequence version 1.
DT   29-SEP-2021, entry version 11.
DE   RecName: Full=Cell surface-binding protein;
DE   AltName: Full=Carbonic anhydrase homolog;
GN   ORFNames=D8L;
OS   Variola virus.
OC   Viruses; Varidnaviria; Bamfordvirae; Nucleocytoviricota; Pokkesviricetes;
OC   Chitovirales; Poxviridae; Chordopoxvirinae; Orthopoxvirus.
OX   NCBI_TaxID=10255;
OH   NCBI_TaxID=9606; Homo sapiens (Human).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=Bangladesh-1975;
RX   PubMed=8264798; DOI=10.1038/366748a0;
RA   Massung R.F., Esposito J.J., Liu L.I., Qi J., Utterback T.R., Knight J.C.,
RA   Aubin L., Yuran T.E., Parsons J.M., Loparev V.N., Selivanov N.A.,
RA   Cavallaro K.F., Kerlavage A.R., Mahy B.W.J., Venter J.C.;
RT   "Potential virulence determinants in terminal regions of variola smallpox
RT   virus genome.";
RL   Nature 366:748-751(1993).
CC   -!- FUNCTION: Binds to chondroitin sulfate on the cell surface to provide
CC       virion attachment to target cell. {ECO:0000250}.
CC   -!- SUBUNIT: Homodimer; disulfide-linked.
CC   -!- SUBCELLULAR LOCATION: Virion membrane {ECO:0000305}. Note=Component of
CC       the mature virion (MV) membrane. {ECO:0000305}.
CC   -!- INDUCTION: Expressed in the late phase of the viral replicative cycle.
CC   -!- PTM: Apparently non-glycosylated. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the alpha-carbonic anhydrase family.
CC       {ECO:0000305}.
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DR   EMBL; L22579; AAA60846.1; -; Genomic_DNA.
DR   PIR; H72162; H72162.
DR   PIR; T28536; T28536.
DR   RefSeq; NP_042142.1; NC_001611.1.
DR   SMR; P0DSY2; -.
DR   GeneID; 1486424; -.
DR   KEGG; vg:1486424; -.
DR   Proteomes; UP000119805; Genome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0019031; C:viral envelope; IEA:UniProtKB-KW.
DR   GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004089; F:carbonate dehydratase activity; IEA:InterPro.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   GO; GO:0046718; P:viral entry into host cell; IEA:UniProtKB-KW.
DR   GO; GO:0019062; P:virion attachment to host cell; IEA:UniProtKB-KW.
DR   Gene3D; 3.10.200.10; -; 1.
DR   InterPro; IPR001148; CA_dom.
DR   InterPro; IPR036398; CA_dom_sf.
DR   InterPro; IPR023561; Carbonic_anhydrase_a-class.
DR   PANTHER; PTHR18952; PTHR18952; 1.
DR   Pfam; PF00194; Carb_anhydrase; 1.
DR   SMART; SM01057; Carb_anhydrase; 1.
DR   SUPFAM; SSF51069; SSF51069; 1.
DR   PROSITE; PS51144; ALPHA_CA_2; 1.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Host-virus interaction; Late protein; Membrane;
KW   Transmembrane; Transmembrane helix; Viral attachment to host cell;
KW   Viral envelope protein; Virion; Virus entry into host cell.
FT   CHAIN           1..304
FT                   /note="Cell surface-binding protein"
FT                   /id="PRO_0000077452"
FT   TOPO_DOM        1..275
FT                   /note="Virion surface"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        276..294
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        295..304
FT                   /note="Intravirion"
FT                   /evidence="ECO:0000255"
FT   DOMAIN          1..235
FT                   /note="Alpha-carbonic anhydrase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01134"
FT   DISULFID        262
FT                   /note="Interchain"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   304 AA;  35401 MW;  D7210C50F75E1625 CRC64;
     MSQQLSPINI ETKKAISNAR LKPLNIHYNE SKPTTIQNTG KLVRINFKGG YLSGGFLPNE
     YVLSSLHIYW GKEDDYGSNH LIDVYKYSGE INLVHWNKKK YSSYEEAKKH DDGLIIISIF
     LQVSDHKNVY FQKIVNQLDS IRTANTSAPF DSVFYLDNLL PSKLDYFKYL GTTINHSADA
     VWIIFPTPIN IHSDQLSKFR TLLSLSNHEG KPHYITENYR NPYKLNDDTE VYYSGEIIRA
     ATTSPARENY FMRWLSDLRE TCFSYYQKYI EGNKTFAIIA IVFVYILTAI LFLMSRRYSR
     EKQN