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Related Concept Videos

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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...
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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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The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
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Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
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Related Experiment Video

Updated: Jan 10, 2026

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract
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GOA-1 regulates spermathecal transits.

Fereshteh Sadeghian1, Virginie Sjoelund2, Erin J Cram3

  • 1Bioengineering, Northeastern University, Boston, MA.

Micropublication Biology
|November 27, 2025
PubMed
Summary
This summary is machine-generated.

The inhibitory Gαi/o subunit GOA-1 regulates C. elegans spermatheca transit. While 16 GOA-1 interactors were identified, their depletion did not cause obvious transit defects, suggesting complex regulation.

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Area of Science:

  • Cellular Biology
  • Developmental Biology
  • Neuroscience

Background:

  • G protein signaling is crucial for regulating Ca2+ dynamics and contractility in the C. elegans spermatheca.
  • Previous studies highlighted the roles of GSA-1/Gαs and Protein Kinase A (PKA) in modulating spermathecal Ca2+ oscillations and contractility.

Purpose of the Study:

  • To investigate the role of the inhibitory Gαi/o subunit, GOA-1, in regulating spermathecal transit.
  • To identify potential interactors of GOA-1 involved in spermathecal function.

Main Methods:

  • Utilized TurboID proximity labeling and mass spectrometry to identify GOA-1 interactors.
  • Employed RNA interference (RNAi) to deplete candidate interactors and assess spermathecal transit defects.

Main Results:

  • Identified 16 candidate interactors of GOA-1.
  • Depletion of these candidate interactors via RNAi did not result in overt spermathecal transit defects.

Conclusions:

  • The inhibitory Gαi/o subunit GOA-1 plays a role in regulating spermathecal transit in C. elegans.
  • The identified GOA-1 interactors may not be essential for spermathecal transit or function through redundant pathways.