Reviewed, UniProtKB/Swiss-Prot P04055 (PA21B_RAT)

Names and origin

Protein names

Recommended name:
    Phospholipase A2
    EC=3.1.1.4
Alternative name(s):
    Phosphatidylcholine 2-acylhydrolase 1B
    Group IB phospholipase A2

Gene names

Name:

Pla2g1b

Organism

Rattus norvegicus (Rat)

Taxonomic identifier

10116 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Rattus

Protein attributes

Sequence length	146 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	PA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides.
Catalytic activity	Phosphatidylcholine + H2O = 1-acylglycerophosphocholine + a carboxylate.
Cofactor	Binds 1 calcium ion per subunit By similarity.
Subcellular location	Secreted.
Sequence similarities	Belongs to the phospholipase A2 family.

Ontologies

Keywords
Biological process	Lipid degradation
Cellular component	Secreted
Domain	Signal
Ligand	Calcium Metal-binding
Molecular function	Hydrolase
PTM	Disulfide bond
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological process	cellular response to insulin stimulus Inferred from sequence or structural similarity. Source: UniProtKB fatty acid biosynthetic process Inferred from direct assay. Source: UniProtKB glucose transport Inferred from sequence or structural similarity. Source: UniProtKB positive regulation of DNA replication Inferred from direct assay. Source: UniProtKB
Cellular component	secretory granule Inferred from direct assay. Source: RGD
Molecular function	calcium ion binding Inferred from electronic annotation. Source: UniProtKB-KW calcium-dependent phospholipase A2 activity Inferred from direct assay. Source: RGD cell surface binding Inferred from direct assay. Source: UniProtKB receptor binding Inferred from direct assay. Source: UniProtKB
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Signal peptide	1 – 15	15
	Propeptide	16 – 22	7	Activation peptide		PRO_0000022747
	Chain	23 – 146	124	Phospholipase A2		PRO_0000022748
Sites
	Active site	70	1
	Active site	121	1
	Metal binding	50	1	Calcium; via carbonyl oxygen By similarity
	Metal binding	52	1	Calcium; via carbonyl oxygen By similarity
	Metal binding	54	1	Calcium; via carbonyl oxygen By similarity
	Metal binding	71	1	Calcium By similarity
Amino acid modifications
	Disulfide bond	33 ↔ 99		By similarity
	Disulfide bond	49 ↔ 146		By similarity
	Disulfide bond	51 ↔ 67		By similarity
	Disulfide bond	66 ↔ 127		By similarity
	Disulfide bond	73 ↔ 120		By similarity
	Disulfide bond	83 ↔ 113		By similarity
	Disulfide bond	106 ↔ 118		By similarity

Sequences

	Sequence		Length	Mass (Da)
	P04055-1 [UniParc]. Last modified November 1, 1986. Version 1. Checksum: 7EC4F7A491B913D0	FASTA	146	16,424
	10 20 30 40 50 60 MKLLLLAALL TAGVTAHSIS TRAVWQFRNM IKCTIPGSDP LREYNNYGCY CGLGGSGTPV 70 80 90 100 110 120 DDLDRCCQTH DHCYNQAKKL ESCKFLIDNP YTNTYSYKCS GNVITCSDKN NDCESFICNC 130 140 DRQAAICFSK VPYNKEYKDL DTKKHC

References

[1]	"Dog and rat pancreatic phospholipases A2: complete amino acid sequences deduced from complementary DNAs." Ohara O., Tamaki M., Nakamura E., Tsuruta Y., Fujii Y., Shin M., Teraoka H., Okamoto M. J. Biochem. 99:733-739(1986) [PubMed: 3754861] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA].
[2]	"Presence of pancreatic-type phospholipase A2 mRNA in rat gastric mucosa and lung." Sakata T., Nakamura E., Tsuruta Y., Tamaki M., Teraoka H., Tojo H., Ono T., Okamoto M. Biochim. Biophys. Acta 1007:124-126(1989) [PubMed: 2909239] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA].
[3]	"Rat pancreatic phospholipase A2: purification, characterization, and N-terminal amino acid sequence." Ono T., Tojo H., Inoue K., Kagamiyama H., Yamano T., Okamoto M. J. Biochem. 96:785-792(1984) [PubMed: 6501264] [Abstract] Cited for: PROTEIN SEQUENCE OF 23-54.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	D00036 mRNA. Translation: BAA00024.1.
IPI	IPI00192334.
PIR	PSRT. A92008.
RefSeq	NP_113773.1.
UniGene	Rn.4283
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	P04055.
Genome annotation databases
Ensembl	ENSRNOT00000001525; ENSRNOP00000001525; ENSRNOG00000001153; Rattus norvegicus. [Genome view]
GeneID	29526.
KEGG	rno:29526.
UCSC	NM_031585. rat.
Organism-specific databases
CTD	29526.
RGD	61949. Pla2g1b.
Phylogenomic databases
eggNOG	roNOG16901.
HOVERGEN	P04055.
InParanoid	P04055.
OMA	AKKLDSC.
OrthoDB	EOG98GZPW.
PhylomeDB	P04055.
Enzyme and pathway databases
BRENDA	3.1.1.4. 248.
Gene expression databases
ArrayExpress	P04055.
Genevestigator	P04055.
GermOnline	ENSRNOG00000001153. Rattus norvegicus.
Family and domain databases
InterPro	IPR016090. Phospholipase_A2. IPR013090. Phospholipase_A2_AS. IPR001211. Phospholipase_A2_euk. [Graphical view]
Gene3D	G3DSA:1.20.90.10. Phospholipase_A2. 1 hit.
PANTHER	PTHR11716. Phospholipase_A2. 1 hit.
Pfam	PF00068. Phospholip_A2_1. 1 hit. [Graphical view]
PRINTS	PR00389. PHPHLIPASEA2.
SMART	SM00085. PA2c. 1 hit. [Graphical view]
PROSITE	PS00119. PA2_ASP. 1 hit. PS00118. PA2_HIS. 1 hit. [Graphical view]
ProtoNet	Search...
Other Resources
NextBio	609488.

Entry information

Entry name

PA21B_RAT

Accession

Primary (citable) accession number: P04055

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 1, 1986
Last sequence update:	November 1, 1986
Last modified:	February 9, 2010
This is version 87 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)