Reviewed, UniProtKB/Swiss-Prot P80010 (PLMN_HORSE)

Names and origin

Protein names

Recommended name:
    Plasminogen
    EC=3.4.21.7
Cleaved into the following 2 chains:
    1- Recommended name:
            Plasmin heavy chain A
    2- Recommended name:
            Plasmin light chain B

Gene names

Name:

PLG

Organism

Equus caballus (Horse)

Taxonomic identifier

9796 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Laurasiatheria › Perissodactyla › Equidae › Equus

Protein attributes

Sequence length	338 AA.
Sequence status	Fragment.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	Plasmin dissolves the fibrin of blood clots and acts as a proteolytic factor in a variety of other processes including embryonic development, tissue remodeling, tumor invasion, and inflammation; in ovulation it weakens the walls of the Graafian follicle. It activates the urokinase-type plasminogen activator, collagenases and several complement zymogens, such as C1 and C5. It cleaves fibrin, fibronectin, thrombospondin, laminin and von Willebrand factor. Its role in tissue remodeling and tumor invasion may be modulated by CSPG4.
Catalytic activity	Preferential cleavage: Lys-|-Xaa > Arg-|-Xaa; higher selectivity than trypsin. Converts fibrin into soluble products.
Enzyme regulation	Converted into plasmin by plasminogen activators, both plasminogen and its activator being bound to fibrin. Activated with catalytic amounts of streptokinase.
Subunit structure	Interacts with CSPG4 By similarity.
Subcellular location	Secreted.
Domain	Kringle domains mediate interaction with CSPG4 By similarity.
Miscellaneous	Plasmin is inactivated by alpha-2-antiplasmin immediately after dissociation from the clot.
Sequence similarities	Belongs to the peptidase S1 family. Plasminogen subfamily. Contains at least 1 kringle domain. Contains 1 peptidase S1 domain.

Ontologies

Keywords
Biological process	Blood coagulation Fibrinolysis Tissue remodeling
Cellular component	Secreted
Domain	Kringle
Molecular function	Hydrolase Protease Serine protease
PTM	Disulfide bond Zymogen
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological process	blood coagulation Inferred from electronic annotation. Source: UniProtKB-KW fibrinolysis Inferred from electronic annotation. Source: UniProtKB-KW proteolysis Inferred from electronic annotation. Source: InterPro tissue remodeling Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	extracellular region Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	calcium ion binding Inferred from electronic annotation. Source: InterPro serine-type endopeptidase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	‹1 – 108	›108	Plasmin heavy chain A		PRO_0000028051
	Chain	109 – 338	230	Plasmin light chain B		PRO_0000028052
Regions
	Domain	9 – 88	80	Kringle 5
	Domain	109 – 336	228	Peptidase S1
Sites
	Active site	150	1	Charge relay system By similarity
	Active site	193	1	Charge relay system By similarity
	Active site	288	1	Charge relay system By similarity
	Site	157	1	Interaction with streptokinase Probable
	Site	191	1	Interaction with streptokinase Probable
	Site	269	1	Interaction with streptokinase Probable
	Site	282	1	Site of substrate specificity By similarity
Amino acid modifications
	Disulfide bond	9 ↔ 88		By similarity
	Disulfide bond	30 ↔ 71		By similarity
	Disulfide bond	59 ↔ 83		By similarity
	Disulfide bond	95 ↔ 213		Interchain (between A and B chains) By similarity
	Disulfide bond	105 ↔ 113		Interchain (between A and B chains) By similarity
	Disulfide bond	135 ↔ 151		By similarity
	Disulfide bond	227 ↔ 294		By similarity
	Disulfide bond	257 ↔ 273		By similarity
	Disulfide bond	284 ↔ 312		By similarity
Experimental info
	Non-terminal residue	1	1

Sequences

	Sequence		Length	Mass (Da)
	P80010-1 [UniParc]. Last modified November 1, 1991. Version 1. Checksum: 8E9E56B5C5CDBE01	FASTA	338	37,132
	10 20 30 40 50 60 VQEPSEPDCM LGIGKGYQGK KATTVTGTRC QAWAAQEPHR HSIFTPEANP WANLEKNYCR 70 80 90 100 110 120 NPDGDVNGPW CYTMNPQKLF DYCDVPQCES SPFDCGKPKV EPKKCSGRIV GGCVAIAHSW 130 140 150 160 170 180 PWQISLRTRF GRHFCGGTLI SPEWVLTAAH CLERSSRPST YKVVLGTHHE LRLAAGAQQI 190 200 210 220 230 240 DVSKLFLEPS RADIALLKLS SPAIITQNVI PACLPPADYV VANWAECFVT GWGETQDSSN 250 260 270 280 290 300 AGVLKEAQLP VIENKVCNRY EYLNGRVKST ELCAGHLVGG VDSCQGDSGG PLVCFEKDKY 310 320 330 ILQGVTSWGL GCARPNKPGV YVRVSSFINW IERIMQSN

References

[1]	"Complete amino acid sequence of equine miniplasminogen." Schaller J., Straub C., Kaempfer U., Rickli E.E. Protein Seq. Data Anal. 4:69-74(1991) [PubMed: 1946332] [Abstract] Cited for: PROTEIN SEQUENCE. Tissue: Plasma.

Cross-references

Sequence databases
PIR	A61545.
3D structure databases
HSSP	HSSP built from PDB template 5HPG based on UniProtKB P00747.
SMR	P80010. Positions 93-338.
ModBase	Search...
Protein family/group databases
MEROPS	S01.233.
Genome annotation databases
Ensembl	ENSECAG00000007979. Equus caballus. [Contig view]
Phylogenomic databases
HOVERGEN	P80010.
Enzyme and pathway databases
BRENDA	3.4.21.7. 1464.
Family and domain databases
InterPro	IPR000001. Kringle. IPR018056. Kringle_CS. IPR018059. Kringle_sub. IPR018114. Peptidase_S1/S6_AS. IPR001254. Peptidase_S1_S6. IPR001314. Peptidase_S1A. IPR003966. Peptidase_S1A_prothrombin. [Graphical view]
Gene3D	G3DSA:2.40.20.10. Kringle. 1 hit.
Pfam	PF00051. Kringle. 1 hit. PF00089. Trypsin. 1 hit. [Graphical view]
PRINTS	PR00722. CHYMOTRYPSIN. PR00018. KRINGLE. PR01505. PROTHROMBIN.
ProDom	PD000395. Kringle. 1 hit. [Graphical view] [Entries sharing at least one domain]
SMART	SM00130. KR. 1 hit. SM00020. Tryp_SPc. 1 hit. [Graphical view]
PROSITE	PS00021. KRINGLE_1. 1 hit. PS50070. KRINGLE_2. 1 hit. PS50240. TRYPSIN_DOM. 1 hit. PS00134. TRYPSIN_HIS. 1 hit. PS00135. TRYPSIN_SER. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PLMN_HORSE

Accession

Primary (citable) accession number: P80010

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 1, 1991
Last sequence update:	November 1, 1991
Last modified:	June 16, 2009
This is version 69 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)