PA2B_BUNFA
ID PA2B_BUNFA Reviewed; 145 AA.
AC A6MEY4;
DT 03-OCT-2012, integrated into UniProtKB/Swiss-Prot.
DT 24-JUL-2007, sequence version 1.
DT 03-AUG-2022, entry version 59.
DE RecName: Full=Basic phospholipase A2 BFPA;
DE Short=svPLA2;
DE EC=3.1.1.4;
DE AltName: Full=Antimicrobial phospholipase A2;
DE AltName: Full=Phosphatidylcholine 2-acylhydrolase;
DE Flags: Precursor;
OS Bungarus fasciatus (Banded krait) (Pseudoboa fasciata).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC Serpentes; Colubroidea; Elapidae; Bungarinae; Bungarus.
OX NCBI_TaxID=8613;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 28-47; 83-89 AND 92-100,
RP FUNCTION, SUBUNIT, AND IDENTIFICATION BY MASS SPECTROMETRY.
RC TISSUE=Venom, and Venom gland;
RX PubMed=17383773; DOI=10.1016/j.peptides.2007.02.008;
RA Xu C., Ma D., Yu H., Li Z., Liang J., Lin G., Zhang Y., Lai R.;
RT "A bactericidal homodimeric phospholipases A(2) from Bungarus fasciatus
RT venom.";
RL Peptides 28:969-973(2007).
CC -!- FUNCTION: Snake venom phospholipase A2 (PLA2) that inhibits blood
CC coagulation and shows bactericidal activities against both Gram-
CC negative and -positive bacteria (E.coli, MIC=0.4 uM and S.aureus,
CC MIC=0.1 uM). PLA2 catalyzes the calcium-dependent hydrolysis of the 2-
CC acyl groups in 3-sn-phosphoglycerides. {ECO:0000269|PubMed:17383773}.
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 per subunit. {ECO:0000250};
CC -!- SUBUNIT: Homodimer; disulfide-linked. {ECO:0000269|PubMed:17383773}.
CC -!- SUBCELLULAR LOCATION: Secreted.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC -!- SIMILARITY: Belongs to the phospholipase A2 family. Group I subfamily.
CC D49 sub-subfamily. {ECO:0000305}.
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DR EMBL; DQ868667; ABI64153.1; -; mRNA.
DR AlphaFoldDB; A6MEY4; -.
DR SMR; A6MEY4; -.
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:0042742; P:defense response to bacterium; IEA:UniProtKB-KW.
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 Antibiotic; Antimicrobial; Blood coagulation cascade inhibiting toxin;
KW Calcium; Direct protein sequencing; Disulfide bond;
KW Hemostasis impairing toxin; Hydrolase; Lipid degradation; Lipid metabolism;
KW Metal-binding; Secreted; Signal; Toxin.
FT SIGNAL 1..27
FT /evidence="ECO:0000269|PubMed:17383773"
FT CHAIN 28..145
FT /note="Basic phospholipase A2 BFPA"
FT /id="PRO_0000419214"
FT ACT_SITE 73
FT /evidence="ECO:0000250"
FT ACT_SITE 119
FT /evidence="ECO:0000250"
FT BINDING 53
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 55
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 57
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT BINDING 74
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250"
FT DISULFID 38..97
FT /evidence="ECO:0000250"
FT DISULFID 44
FT /note="Interchain"
FT /evidence="ECO:0000305"
FT DISULFID 52..144
FT /evidence="ECO:0000250"
FT DISULFID 54..70
FT /evidence="ECO:0000250"
FT DISULFID 69..125
FT /evidence="ECO:0000250"
FT DISULFID 76..118
FT /evidence="ECO:0000250"
FT DISULFID 86..111
FT /evidence="ECO:0000250"
FT DISULFID 104..116
FT /evidence="ECO:0000250"
SQ SEQUENCE 145 AA; 15796 MW; AB8625CC94EA8C78 CRC64;
MNPAHLLVLL AVCVSLLGAA NIPPQSLNLY QFKNMIQCAG TQLCVAYVKY GCYCGPGGTG
TPLDQLDRCC QTHDHCYDNA KKFGNCIPYF KTYEYTCNKP DLTCTDAKGS CARNVCDCDR
AAAICFAAAP YNLANFGINK ETHCQ
