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Related Concept Videos

Mutations01:39

Mutations

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Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
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Point and Frameshift Mutations01:30

Point and Frameshift Mutations

Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Generation of Maternal Mutants Using zpc:cas9 Knock-in Zebrafish
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New point mutation in Golga3 causes multiple defects in spermatogenesis.

L F Bentson1, V A Agbor, L N Agbor

  • 1Department of Biology and Chemistry, New Mexico Highlands University, Las Vegas, NM 87701, USA.

Andrology
|March 16, 2013
PubMed
Summary

Male mice with a Golga3 gene mutation exhibit infertility due to disrupted spermatogenesis and germ cell loss. This study investigates the role of GOLGA3 protein in male fertility.

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Area of Science:

  • Reproductive biology
  • Molecular genetics
  • Cell biology

Background:

  • Golgin subfamily A member 3 (GOLGA3) is a Golgi-associated protein involved in protein trafficking and spermatogenesis.
  • A nonsense mutation in the Golga3 gene causes male infertility in mice.

Purpose of the Study:

  • To investigate the role of GOLGA3 in male germ cell development and spermatogenesis using a mouse model.
  • To elucidate the mechanism of germ cell loss and spermiogenesis defects in Golga3-deficient mice.

Main Methods:

  • Genetic analysis of Golga3 mutant mice (repro27).
  • Assessment of spermatogenesis, germ cell apoptosis (TUNEL assay), and spermiogenesis.
  • Evaluation of sperm parameters (concentration, motility) and in vitro fertilization.

Main Results:

  • Golga3(repro27) mice lack GOLGA3 protein expression.
  • Spermatogenesis is disrupted during late meiosis, leading to germ cell loss and apoptosis.
  • Abnormal spermiogenesis, reduced sperm concentration and motility, and failed in vitro fertilization were observed.

Conclusions:

  • GOLGA3 protein is essential for normal spermatogenesis and male fertility.
  • Golga3 deficiency leads to germ cell apoptosis and severe defects in sperm development.
  • Golga3 mutant mice serve as a valuable model for studying GOLGA3 function in male germ cells.