ID   VSP_VIPBN               Reviewed;         257 AA.
AC   E5AJX2;
DT   16-MAY-2012, integrated into UniProtKB/Swiss-Prot.
DT   08-FEB-2011, sequence version 1.
DT   03-AUG-2022, entry version 34.
DE   RecName: Full=Snake venom serine protease nikobin;
DE            Short=SVSP;
DE            EC=3.4.21.-;
DE   Flags: Precursor;
GN   Name=sp-VN;
OS   Vipera berus nikolskii (Nikolsky's adder) (Vipera nikolskii).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC   Serpentes; Colubroidea; Viperidae; Viperinae; Vipera.
OX   NCBI_TaxID=1808362;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom gland;
RX   PubMed=21899053; DOI=10.1134/s1068162011030149;
RA   Ramazanova A.S., Fil'kin S.I., Starkov V.G., Utkin I.N.;
RT   "Molecular cloning and analysis of cDNA sequences encoding serine
RT   proteinase and Kunitz type inhibitor in venom gland of Vipera nikolskii
RT   viper.";
RL   Bioorg. Khim. 37:374-385(2011).
CC   -!- FUNCTION: Snake venom serine protease that may act in the hemostasis
CC       system of the prey. {ECO:0000250}.
CC   -!- SUBUNIT: Monomer. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC   -!- SIMILARITY: Belongs to the peptidase S1 family. Snake venom subfamily.
CC       {ECO:0000255|PROSITE-ProRule:PRU00274}.
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DR   EMBL; FR669449; CBW30778.1; -; mRNA.
DR   AlphaFoldDB; E5AJX2; -.
DR   SMR; E5AJX2; -.
DR   MEROPS; S01.354; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0004252; F:serine-type endopeptidase activity; IEA:InterPro.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR   CDD; cd00190; Tryp_SPc; 1.
DR   Gene3D; 2.40.10.10; -; 2.
DR   InterPro; IPR009003; Peptidase_S1_PA.
DR   InterPro; IPR043504; Peptidase_S1_PA_chymotrypsin.
DR   InterPro; IPR001314; Peptidase_S1A.
DR   InterPro; IPR001254; Trypsin_dom.
DR   InterPro; IPR018114; TRYPSIN_HIS.
DR   Pfam; PF00089; Trypsin; 1.
DR   PRINTS; PR00722; CHYMOTRYPSIN.
DR   SMART; SM00020; Tryp_SPc; 1.
DR   SUPFAM; SSF50494; SSF50494; 1.
DR   PROSITE; PS50240; TRYPSIN_DOM; 1.
DR   PROSITE; PS00134; TRYPSIN_HIS; 1.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Glycoprotein; Hemostasis impairing toxin; Hydrolase;
KW   Protease; Secreted; Serine protease; Signal; Toxin; Zymogen.
FT   SIGNAL          1..18
FT                   /evidence="ECO:0000255"
FT   PROPEP          19..24
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_5000666457"
FT   CHAIN           25..257
FT                   /note="Snake venom serine protease nikobin"
FT                   /id="PRO_5000666458"
FT   DOMAIN          25..248
FT                   /note="Peptidase S1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   ACT_SITE        64
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        109
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        203
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250"
FT   CARBOHYD        120
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        121
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000255"
FT   CARBOHYD        250
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000255"
FT   DISULFID        31..162
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   DISULFID        49..65
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   DISULFID        97..255
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   DISULFID        141..209
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   DISULFID        173..188
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
FT   DISULFID        199..224
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00274"
SQ   SEQUENCE   257 AA;  28216 MW;  4081FA8D98999C9C CRC64;
     MVLIRVLANL LLLQLSYAQK SSELVIGGDE CNINEHPFLA FVTSDRRRCA GTLINQEWVL
     TAAHCNGKYM KIELGVHDKM VRNEDKQTRV PKQKFFCLSS KEYTMWDKDI MLIRLNTPVN
     NSTHIAPVSL ASRPPVVGSV CRIMGWGTIS SPKVILPDVP HCANIEIIKY SKCQGVHPEL
     PAKGRVVCAG IWQGGKDSCH GDSGAPLICN GQLQGLLSWG GDPCAQPLQP GLYTDIFDYS
     DWIQSIIAGN TTATCPP