The β subunit of human rod photoreceptor cGMP‐gated cation channel is generated from a complex transcription unit

FEBS Letters

Porche, G.Erick¹  Ardell, Michelle D.¹  Burke, Emily¹  Aragon, Ileana¹  Pittler, Steven J.¹  Oliveira, Luanne¹ 

[1] Departments of Biochemistry & Molecular Biology, University of South Alabama College of Medicine, Mobile, AL 36688-0002, USA

关键词: Non-selective cGMP-gated cation channel;    Gene structure;    Alternative splicing;    Retina;    Photoreceptor;    Beta subunit;    (Human);   

DOI  :  10.1016/0014-5793(96)00588-1

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Human and bovine rod photoreceptor cGMP-gated cation channel consists of two subunits: α (63 kDa) and β (240 kDa). The human β subunit was shown to consist partly of sequence encoded by the cDNA clone hRCNC2b. Here we present the complete sequence of the human β subunit and demonstrate that the previously reported human GAR1 gene encoding a glutamate-rich protein (hGARP) encodes its N-terminal portion. Using PCR, RNA blot and genomic DNA analysis, we provide evidence that the β subunit is produced from a complex locus on chromosome 16 which is also capable of generating independent transcripts corresponding to GAR1 and the C-terminal two-thirds of the β subunit. The results indicate that the β subunit of the cGMP-gated cation channel is produced from an unusual locus consisting of more than one transcription unit.

【 授权许可】

Unknown