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Cortical organization by the septin cytoskeleton is essential for structural and mechanical integrity of mammalian spermatozoa.

Abstract：

:Septins are polymerizing GTP binding proteins required for cortical organization during cytokinesis and other cellular processes. A mammalian septin gene Sept4 is expressed mainly in postmitotic neural cells and postmeiotic male germ cells. In mouse and human spermatozoa, SEPT4 and other septins are found in the annulus, a cortical ring which separates the middle and principal pieces. Sept4-/- male mice are sterile due to defective morphology and motility of the sperm flagellum. In Sept4 null spermatozoa, the annulus is replaced by a fragile segment lacking cortical material, beneath which kinesin-mediated intraflagellar transport stalls. The sterility is rescued by injection of sperm into oocytes, demonstrating that each Sept4 null spermatozoon carries an intact haploid genome. The annulus/septin ring is also disorganized in spermatozoa from a subset of human patients with asthenospermia syndrome. Thus, cortical organization based on circular assembly of the septin cytoskeleton is essential for the structural and mechanical integrity of mammalian spermatozoa.

journal_name

Dev Cell

journal_title

Developmental cell

authors

Ihara M,Kinoshita A,Yamada S,Tanaka H,Tanigaki A,Kitano A,Goto M,Okubo K,Nishiyama H,Ogawa O,Takahashi C,Itohara S,Nishimune Y,Noda M,Kinoshita M

doi

10.1016/j.devcel.2004.12.005

keywords:

subject

Has Abstract

pub_date

2005-03-01 00:00:00

pages

343-52

issue

3

eissn

1534-5807

issn

1878-1551

pii

S1534-5807(04)00459-9

journal_volume

8

pub_type

杂志文章

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