Role of tyrosine phosphorylation in sperm capacitation / acrosome reaction

نویسندگان

  • Rajesh K Naz
  • Preeti B Rajesh
چکیده

Capacitation is an important physiological pre-requisite before the sperm cell can acrosome react and fertilize the oocyte. Recent reports from several laboratories have amply documented that the protein phosphorylation especially at tyrosine residues is one of the most important events that occur during capacitation. In this article, we have reviewed the data from our and other laboratories, and have constructed a heuristic model for the mechanisms and molecules involved in capacitation/acrosome reaction.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Calmodulin antagonists differentially affect capacitation-associated protein tyrosine phosphorylation of mouse sperm components.

Sperm capacitation in vitro is thought to be correlated with the increased protein tyrosine phosphorylation of a subset of sperm components. Our group recently used a pharmacological approach to demonstrate that calmodulin (CaM), a 17 kDa calcium sensor protein, has a role in sperm capacitation. In the present study, we have used several CaM antagonists in an attempt to characterize further the...

متن کامل

Activation of proacrosin accompanies upregulation of sp32 protein tyrosine phosphorylation in pig sperm.

This study investigated the relationship between acrosin activation and pig sperm proacrosin binding protein (sp32) phosphorylation levels. Differently processed pig spermatozoa (fresh semen sperm, capacitation sperm, acrosome reaction sperm, capacitation-like sperm, and thawed sperm) were subjected to sodium dodecyl sulfate polyacrylamide gel electrophoresis and Western blot analysis. The fres...

متن کامل

Src activation triggers capacitation and acrosome reaction but not motility in human spermatozoa.

BACKGROUND Protein tyrosine phosphorylation is one of the main processes associated with sperm activation. Although this process and its targets have been well characterized, only few tyrosine kinases have been identified so far and their roles in spermatozoa are still largely unknown. In this study, we report the presence and localization of Src kinase in ejaculated human spermatozoa and inves...

متن کامل

Capacitation-associated Changes in Protein-tyrosine-phosphorylation, Hyperactivation and Acrosome Reaction in Guinea Pig Sperm*

The aim of this study was to evaluate the effects of Ca, HCO3 and BSA on the in vitro capacitation-associated protein tyrosine phosphorylation, hyperactivation and acrosome reaction in guinea pig sperm. Caudal epididymal sperm were incubated in four different groups: modified TALP (Tyrode’s albumin lactate pyruvate) or TALP without one of the medium constituents (Ca, HCO3 and BSA). After incuba...

متن کامل

Transient receptor potential-canonical 3 modulates sperm motility and capacitation-associated protein tyrosine phosphorylation via [Ca2+]i mobilization.

Ca(2+) signaling is pivotal for sperm maturation, including the processes of motility, capacitation, and the acrosome reaction. As a Ca(2+) conductor, transient receptor potential-canonical 3 (TRPC3) plays an important role in somatic cells. However, the function of TRPC3 in sperm is not well understood. Here, a pharmacological approach was used to investigate the role and mechanism of TPRC3 in...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Reproductive biology and endocrinology : RB&E

دوره 2  شماره 

صفحات  -

تاریخ انتشار 2004