CPEB2, A Novel Putative Translational Regulator in Mouse Haploid Germ Cells1

Translational control of specific mRNAs by cytoplasmic polyadenylation has fundamental roles in gametogenesis. The cytoplasmic polyadenylation element binding (CPEB) protein regulates cytoplasmic polyadenylation of mRNAs as a trans factor in oogenesis and spermatogenesis. The CPEB protein contains t...

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Veröffentlicht in:Biology of reproduction 2003-07, Vol.69 (1), p.261-268
Hauptverfasser: Kurihara, Yasuyuki, Tokuriki, Motoyuki, Myojin, Reiko, Hori, Tamaki, Kuroiwa, Asato, Matsuda, Yoichi, Sakurai, Takayuki, Kimura, Minoru, Hecht, Norman B, Uesugi, Seiichi
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container_end_page 268
container_issue 1
container_start_page 261
container_title Biology of reproduction
container_volume 69
creator Kurihara, Yasuyuki
Tokuriki, Motoyuki
Myojin, Reiko
Hori, Tamaki
Kuroiwa, Asato
Matsuda, Yoichi
Sakurai, Takayuki
Kimura, Minoru
Hecht, Norman B
Uesugi, Seiichi
description Translational control of specific mRNAs by cytoplasmic polyadenylation has fundamental roles in gametogenesis. The cytoplasmic polyadenylation element binding (CPEB) protein regulates cytoplasmic polyadenylation of mRNAs as a trans factor in oogenesis and spermatogenesis. The CPEB protein contains two RNA recognition motifs and a Zn-finger structure. Proteins (KIAA0940 and KIAA1673) with similar structures are predicted from the genome database, but nothing is known about their expression and function. Here, we report another novel member of the CPEB protein family, CPEB2. Comparison of the amino acid sequences of CPEB family members suggests that the family can be divided structurally and, perhaps, functionally into two groups: the CPEB group, and the CPEB2-KIAA0940-KIAA1673 group. The CPEB2 maps to mouse chromosome distal 5B and is abundantly expressed in testis. However, it was detected by reverse transcription-polymerase chain reaction in all tissues that we examined. It preferentially binds to poly(U) and localizes to the cytoplasm in transfected HeLa cells. The CPEB2 is expressed postmeiotically in mouse spermatogenesis, suggesting a possible role in translational regulation of stored mRNAs in transcriptionally inactive haploid spermatids.
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source BioOne Complete; Oxford University Press Journals All Titles (1996-Current); EZB-FREE-00999 freely available EZB journals
subjects Contents
spermatid
spermatogenesis
testis
title CPEB2, A Novel Putative Translational Regulator in Mouse Haploid Germ Cells1
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