P2 PROTAMINES FROM HUMAN SPERM ARE ZINC FINGER PROTEINS WITH ONE CYS2/HIS2 MOTIF

被引：52

作者：

BIANCHI, F ^{[1
]}

ROUSSEAUXPREVOST, R ^{[1
]}

SAUTIERE, P ^{[1
]}

ROUSSEAUX, J ^{[1
]}

机构：

[1] INST RECH CANC,CNRS,URA 409,PL VERDUN,F-59045 LILLE,FRANCE

来源：

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 1992年 / 182卷 / 02期

关键词：

D O I：

10.1016/0006-291X(92)91766-J

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

P1 (HP1) and P2 (HP2, HP3, HP4) protamines were isolated from human sperm nuclei in the reduced form and their interaction with zinc and cobalt was studied. One zinc atom per molecule of P2 protamines but not of P1 protamine was found. Absorption spectra of P2 protamines with cobalt were characteristic of a tetrahedral complex involving two histidine and two cysteine residues and with one cobalt per molecule. A tetrahedral complex was found neither in P1 protamines nor in P2 protamines alkylated at cysteine or at histidine residues. The zinc finger motif Cys2 His2 of P2 protamines may play a role in stabilization of human sperm chromatin and in inhibition of transcription. © 1992.

引用

页码：540 / 547

页数：8

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