Identification of the alternative promoters of the KChIP4 subfamily.

Abstract:

:The subfamily of voltage-dependent potassium (Kv) channel interacting protein 4 (KChIP4) is made up of the auxiliary interacting protein of voltage-dependent potassium channels. In this study, the structure of four splicing variants of the human KChIP4 gene was analyzed. Three of the four isoforms of the KChIP4 gene, KChIP4.1, KChIP4.2 and KChIP4.4, were amplified from mouse and human fetal brain tissues by reverse transcription-polymerase chain reaction and then identified. Based on the bioinformatics analysis of the genomic sequences of the gene, we cloned and characterized two promoter fragments from the KChIP4 gene. One was a 325 bp fragment upstream of the 5' end of the KChIP4.1 mRNA sequence and the other was an 818 bp fragment located immediately at the 5' end of the KChIP4.4 variant. Both of them can initiate the transcription of the reporter gene in HT1080 cells and Sprague-Dawley (SD) rat fetal brain neurons, and they contain CG islands, except typical TATA boxes and CAAT boxes. This shows that the KChIP4 gene expression is regulated by an alternative promoter.

authors

Deng XY,Cai F,Xia K,Pan Q,Long ZG,Wu LQ,Liang DS,Dai HP,Zhang ZH,Xia JH

doi

10.1111/j.1745-7270.2005.00034.x

subject

Has Abstract

pub_date

2005-04-01 00:00:00

pages

241-7

issue

4

eissn

1672-9145

issn

1745-7270

journal_volume

37

pub_type

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