Study of the sites of plasminogen molecule which are responsible for inhibitory effect of Lys-plasminogen on platelet aggregation

Plasminogen/plasmin system is involved in such important processes as thrombosis, inflammation and cancer. Plasmin and plasminogen mediate their action through plasminogen-binding proteins on the cell surface. Lys-plasminogen, but not Glu-plasminogen, shows inhibitory effect on platelet aggregation induced by ADP, collagen and thrombin in preparations of both: platelet-rich plasma and washed platelets. We have shown that the kringle domains of Lys-plasminogen mediate interaction of this proenzyme with platelet- surface proteins. The aim of the work is to study the role of certain kringle domains in the inhibitory effect of Lys-plasminogen and to determine possible plasminogen-binding proteins on the platelet surface. All studied plasminogen fragments (K1-3, K4 and K5) abolished the inhibitory effect of Lys-plasminogen on platelet aggregation. We observed that K5 was more effective than K1-3 and K4. Biotin-labeled Lys-plasminogen, Glu-plasminogen and plasminogen fragment K1-3 possessed the highest affinity for actin, whereas the binding of biotin-labeled mini-plasminogen and K4 to actin was negligible. We have suggested that inhibitory effect of Lys-plasminogen is due to the interaction of kringle domains of this proenzyme with membrane-bound proteins which are exposed on the platelet surface during activation and are involved in thrombus formation.

Medienart:

Artikel

Erscheinungsjahr:

2014

Erschienen:

2014

Enthalten in:

Zur Gesamtaufnahme - volume:86

Enthalten in:

Ukrainian biochemical journal - 86(2014), 5 vom: 01. Sept., Seite 82-8

Sprache:

Englisch

Beteiligte Personen:

Roka-Moya, Y M [VerfasserIn]
Zhernossekov, D D [VerfasserIn]
Yusova, E I [VerfasserIn]
Kapustianenko, L G [VerfasserIn]
Grinenko, T V [VerfasserIn]

Themen:

9001-32-5
9001-91-6
Actins
EC 3.4.21.5
EC 3.4.21.7
Fibrinogen
Fibrinolysin
Journal Article
Lysyl-plasminogen
Miniplasminogen
Peptide Fragments
Plasminogen
Thrombin
Thrombospondins

Anmerkungen:

Date Completed 17.04.2015

Date Revised 13.11.2019

published: Print

Citation Status MEDLINE

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM247499862