PA2BA_MICNI
ID PA2BA_MICNI Reviewed; 118 AA.
AC P81166;
DT 15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT 15-DEC-1998, sequence version 1.
DT 03-AUG-2022, entry version 100.
DE RecName: Full=Basic phospholipase A2 nigroxin A;
DE Short=svPLA2;
DE EC=3.1.1.4;
DE AltName: Full=Phosphatidylcholine 2-acylhydrolase;
OS Micrurus nigrocinctus (Central American coral snake) (Gargantilla).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC Serpentes; Colubroidea; Elapidae; Elapinae; Micrurus.
OX NCBI_TaxID=8635;
RN [1]
RP PROTEIN SEQUENCE, AND MASS SPECTROMETRY.
RC TISSUE=Venom;
RX PubMed=9914497; DOI=10.1046/j.1432-1327.1999.00021.x;
RA Alape-Giron A., Persson B., Cederlund E., Flores-Diaz M., Gutierrez J.-M.,
RA Thelestam M., Bergman T., Joernvall H.;
RT "Elapid venom toxins: multiple recruitments of ancient scaffolds.";
RL Eur. J. Biochem. 259:225-234(1999).
RN [2]
RP PARTIAL PROTEIN SEQUENCE, AND FUNCTION.
RC TISSUE=Venom;
RX PubMed=8603741; DOI=10.1016/0014-5793(95)01543-4;
RA Alape-Giron A., Persson B., Cedelund E., Flores-Diaz M., Gutierrez J.-M.,
RA Thelestam M., Bergman T., Joernvall H.;
RT "Characterization of multiple nicotinic acetylcholine receptor-binding
RT proteins and phospholipases A2 from the venom of the coral snake Micrurus
RT nigrocinctus.";
RL FEBS Lett. 380:29-32(1996).
CC -!- FUNCTION: Snake venom phospholipase A2 (PLA2) that has only a weak
CC enzymatic activity. It has a myotoxic activity in vivo (dystrophic
CC effect). PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl
CC groups in 3-sn-phosphoglycerides. {ECO:0000269|PubMed:8603741}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-
CC glycero-3-phosphocholine + a fatty acid + H(+); Xref=Rhea:RHEA:15801,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:28868,
CC ChEBI:CHEBI:57643, ChEBI:CHEBI:58168; EC=3.1.1.4;
CC Evidence={ECO:0000255|PROSITE-ProRule:PRU10035, ECO:0000255|PROSITE-
CC ProRule:PRU10036};
CC -!- COFACTOR:
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108; Evidence={ECO:0000250};
CC Note=Binds 1 Ca(2+) ion. {ECO:0000250};
CC -!- SUBCELLULAR LOCATION: Secreted.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC -!- MASS SPECTROMETRY: Mass=14181.5; Method=Electrospray; Note=In vitro
CC carboxymethylated.; Evidence={ECO:0000269|PubMed:9914497};
CC -!- SIMILARITY: Belongs to the phospholipase A2 family. Group I subfamily.
CC D49 sub-subfamily. {ECO:0000305}.
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DR AlphaFoldDB; P81166; -.
DR SMR; P81166; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0005509; F:calcium ion binding; IEA:InterPro.
DR GO; GO:0004623; F:phospholipase A2 activity; IEA:UniProtKB-EC.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR GO; GO:0050482; P:arachidonic acid secretion; IEA:InterPro.
DR GO; GO:0016042; P:lipid catabolic process; IEA:UniProtKB-KW.
DR GO; GO:0006644; P:phospholipid metabolic process; IEA:InterPro.
DR CDD; cd00125; PLA2c; 1.
DR Gene3D; 1.20.90.10; -; 1.
DR InterPro; IPR001211; PLipase_A2.
DR InterPro; IPR033112; PLipase_A2_Asp_AS.
DR InterPro; IPR016090; PLipase_A2_dom.
DR InterPro; IPR036444; PLipase_A2_dom_sf.
DR InterPro; IPR033113; PLipase_A2_His_AS.
DR PANTHER; PTHR11716; PTHR11716; 1.
DR Pfam; PF00068; Phospholip_A2_1; 1.
DR PRINTS; PR00389; PHPHLIPASEA2.
DR SMART; SM00085; PA2c; 1.
DR SUPFAM; SSF48619; SSF48619; 1.
DR PROSITE; PS00119; PA2_ASP; 1.
DR PROSITE; PS00118; PA2_HIS; 1.
PE 1: Evidence at protein level;
KW Calcium; Direct protein sequencing; Disulfide bond; Hydrolase;
KW Lipid degradation; Lipid metabolism; Metal-binding; Myotoxin; Secreted;
KW Toxin.
FT CHAIN 1..118
FT /note="Basic phospholipase A2 nigroxin A"
FT /id="PRO_0000161661"
FT ACT_SITE 46
FT /evidence="ECO:0000250"
FT ACT_SITE 92
FT /evidence="ECO:0000250"
FT BINDING 26
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 28
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 30
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 47
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT DISULFID 11..70
FT /evidence="ECO:0000250"
FT DISULFID 25..117
FT /evidence="ECO:0000250"
FT DISULFID 27..43
FT /evidence="ECO:0000250"
FT DISULFID 42..98
FT /evidence="ECO:0000250"
FT DISULFID 49..91
FT /evidence="ECO:0000250"
FT DISULFID 59..84
FT /evidence="ECO:0000250"
FT DISULFID 77..89
FT /evidence="ECO:0000250"
SQ SEQUENCE 118 AA; 13341 MW; B7A733663063B50A CRC64;
NLYQLKNMIK CTNTRHWVSF TNYGCYCGYG GSGTPVDELD KCCQVHDKCY DTAKHVCKCS
PSMTMYSYDC SEGKLTCKDN NTKCKDFVCN CDRTAALCFA KAPYNNKNFK IDPTKGCQ
