Results 31 to 40 of about 26,981 (241)

Ubiquitination Regulates the Morphogenesis and Function of Sperm Organelles

Cells, 2013
It is now understood that protein ubiquitination has diverse cellular functions in eukaryotes. The molecular mechanism and physiological significance of ubiquitin-mediated processes have been extensively studied in yeast, Drosophila and mammalian somatic
Nobuhiro Nakamura
doaj   +1 more source

A mechanism for differential release of acrosomal enzymes during the acrosome reaction [PDF]

Biochemical Journal, 1991
To study the organization of fertilization enzymes in the sperm acrosome, we isolated and characterized two physicochemically distinct acrosomal fractions of guinea-pig spermatozoa. A soluble fraction contained the 25,000-Mr acrosomal autoantigen, AA1, and most of the acrosomal hyaluronidase and dipeptidyl peptidase II activity. A particulate fraction,
D M, Hardy, M N, Oda, D S, Friend, T T, Huang   +3 more
openaire   +2 more sources

Functional sperm assessments of African Lion Panthera leo (Mammalia: Carnivora: Felidae) in field conditions

Journal of Threatened Taxa, 2019
Wild African Lion Panthera leo populations are decreasing due to inbreeding and reduced genetic variability.  Thus, the use of assisted reproduction in the species could one day become essential.
Thiesa Butterby Soler Barbosa, Daniel de Souza Ramos Angrimani, Bruno Rogério Rui, João Diego de Agostini Losano, Luana de Cássia Bicudo, Marcel Henrique Blank, Marcilio Nichi, Cristiane Schilbach Pizzutto   +7 more
doaj   +1 more source

SEQUENTIAL RELEASE OF ACROSOMAL MEMBRANES AND ACROSOMAL ENZYMES OF RAM SPERMATOZOA [PDF]

Reproduction, 1974
Summary. A method involving the treatment of ram spermatozoa with MgCl2 followed by Hyamine 2389 and Triton X-100 is described, which gave selective removal of the acrosomal membranes and acrosomal enzymes. The effect on the individual membranes of ram spermatozoa was evaluated by electron microscopy.
P N, Srivastava, J F, Munnell, C H, Yang, C W, Foley   +3 more
openaire   +2 more sources

Plasma membrane-Acrosome-Mitochondria

, 2019
Raw data of sperm plasma membrane, acrosome, mitochondria, and healthy sperm, and the results of statistical ...
Vui Nguyen (6833942)
core   +1 more source

Acid Glycohydrolases in Rat Spermatocytes, Spermatids and Spermatozoa: Enzyme Activities, Biosynthesis and Immunolocalization

Biological Procedures Online, 2001
Mammalian sperm acrosome contains several glycohydrolases thought to aid in the dispersion and digestion of vestments surrounding the egg. In this study, we have used multiple approaches to examine the origin of acrosome-associated glycohdyrdolases ...
Abou-Haila Aida, Tulsiani Daulat
doaj   +1 more source

Atypical structure of the nuclear membrane, distribution of nuclear pores and lamin B1 in spermatozoa of patients with complete and partial globozoospermia

Frontiers in Genetics
Globozoospermia is a form of male infertility characterized by spermatozoa with spherical heads lacking acrosomes. The aim of this study was to evaluate ultrastructural and molecular defects in different types of globozoospermia.
Elizaveta Bragina, Elizaveta Bragina, Svetlana Kurchashova, Marina Suhomlinova, Tatiana Gasanova, Svetlana Ermolaeva, Tatyana Sorokina, Eva Kirs, Evgeniy Arifulin, Olga Solovova, Oxana Ryzhkova, Sabina Khayat, Marina Andreeva, Vyacheslav Chernykh, Vyacheslav Chernykh   +14 more
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Review: Sperm–oocyte interactions and their implications for bull fertility, with emphasis on the ubiquitin–proteasome system

Animal, 2018
Fertilization is an intricate cascade of events that irreversibly alter the participating male and female gamete and ultimately lead to the union of paternal and maternal genomes in the zygote.
P. Sutovsky
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Immunofluorescence detection of the acrosome.

, 2015
(a) Immunofluorescence detection of the acrosome with PNA (green) was performed to illustrate and quantify the sperm acrosome abnormalities. Hoechst was used to nuclei staining (blue); bar = 20μm.
Ling Chen (25698), Min Jiang (56794), Xiaoyan Huang (112885), Haoyu Zheng (788887), Zhengrong Xia (788888), Yibo Wu (788885), Ahong Zhong (788886), Jinjin Yu (788889)   +7 more
core   +1 more source

Human globozoospermia‐related genes and their role in acrosome biogenesis

, 2023
The mammalian acrosome is a secretory vesicle attached to the sperm nucleus whose fusion with the overlying plasma membrane is required to achieve fertilization.
Moreno, Ricardo D., Ricardo D. Moreno
core   +1 more source