CD41 Proteins

Protein Information

CD41, also known as platelet glycoprotein IIb or ITGA2B, is a protein composed of two subunits: a 120 kDa alpha subunit and a 23 kDa beta subunit. It interacts with CD61 (gpIIIa, integrin beta III) in the presence of calcium to form a functional adhesive protein receptor. Initially thought to be expressed exclusively on platelets and megakaryocytes, CD41 is also found on hematopoietic progenitors in the embryo, fetus, and adult, indicating its role in early stages of hematopoietic differentiation. CD41 plays a crucial role in platelet function and blood coagulation by mediating platelet aggregation. Upon blood vessel damage, CD41 binds to various adhesion molecules, including von Willebrand factor, fibrinogen, fibronectin, and vitronectin, facilitating platelet adhesion and aggregation. This receptor is essential for platelet function, contributing to the binding of several adhesion molecules and playing a significant role in hemostasis. Diseases associated with CD41 dysfunction include Glanzmann Thrombasthenia and Platelet type-16 bleeding disorder, highlighting its importance in normal platelet function and blood coagulation processes.

Synonyms

AI172977; alpha IIb; alphaIIb; alphaIIb protein; BDPLT16; BDPLT2; CD41; CD41B; form 1; form 2; GP IIb; GP2B; GPalpha IIb; GPIIb; GT; GTA; HPA3; integrin alpha 2b; integrin alpha 2b (Cd41b); integrin alpha-IIb; Integrin alpha-IIb heavy chain; Integrin alpha-IIb light chain; Integrin alpha-IIb light chain, form 1; Integrin alpha-IIb light chain, form 2; integrin subunit alpha 2b; integrin subunit alpha IIb; integrin, alpha 2B; integrin, alpha 2b (platelet glycoprotein IIb of IIb/IIIa complex, antigen CD41); ITGA2B; ITGAB; platelet fibrinogen receptor, alpha subunit; platelet glycoprotein IIb; platelet glycoprotein IIb of IIb/II Ia complex; platelet glycoprotein IIb of IIb/IIIa complex; platelet membrane glycoprotein IIb; platelet-specific antigen BAK; PPP1R93; protein phosphatase 1, regulatory subunit 93