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Seems to be a major component of sperm tail outer dense fibers (ODF). ODFs are filamentous structures located on the outside of the axoneme in the midpiece and principal piece of the mammalian sperm tail and may help to maintain the passive elastic structures and elastic recoil of the sperm tail. May have a modulating influence on sperm motility. Functions as a general scaffold protein that is specifically localized at the distal/subdistal appendages of mother centrioles. Component of the centrosome matrix required for the localization of PLK1 and NIN to the centrosomes. Required for the formation and/or maintenance of normal CETN1 assembly.
Gene References into Functions
Cenexin controls centrosome positioning during cell migration by modulating microtubule organization and stability.Cenexin is required for spindle orientation. PMID: 26948879
Cby plays an important role in organization of both primary and motile cilia in collaboration with Cnx. PMID: 22911743
Trichoplein controls microtubule anchoring at the centrosome by binding to Odf2 and ninein. PMID: 21325031
Cdk5 in the centriolar appendages mediates cenexin1 localization and primary cilia formation. PMID: 20234188
Mouse and rat ODF2 protein homolog sequences and expression are compared. PMID: 9740324
We propose that hCenexin1 is a critical centrosomal component whose C-terminal extension is required for proper recruitment of Plk1 and other components crucial for normal mitosis. PMID: 16966375
A splice variant of hODF2 called hCenexin1, but not hODF2 itself, efficiently localizes to somatic centrosomes via a variant-specific C-terminal extension and recruits Plk1 through a Cdc2-dependent phospho-S796 motif within the extension. PMID: 19386263
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Subcellular Location
Cytoplasm, cytoskeleton, microtubule organizing center, centrosome. Cell projection, cilium. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome, centriole. Cytoplasm, cytoskeleton, spindle pole. Cell projection, cilium, flagellum.
Protein Families
ODF2 family
Tissue Specificity
Testis-specific (at protein level). Highly expressed in cytoplasm of step 2 round spermatids. Detected in the middle piece and extends to about half the principal piece of the sperm tails.