Biomedical Science Letters (대한의생명과학회지)
- Volume 6 Issue 1
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- Pages.11-17
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- 2000
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- 1738-3226(pISSN)
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- 2288-7415(eISSN)
Cloning of SNAS-25 Gene from Rat Brain cDNA Library
Rat Brain cDNA Library로부터 SNAP-25 유전자의 클로닝
- Cho, Ae-Ri (Department of Biology, Chungnam National University) ;
- Ji, Young-Mi (Department of Biology, Chungnam National University) ;
- Yoo, Min (Department of Biology, Keimyung University) ;
- Lee, Soon-Chul (Department of Pharmacy, Chungnam National University) ;
- Yoo, Kwan-Hee (Department of Biology, Chungnam National University)
- 조애리 (충남대학교 자연과학대학 생물학과) ;
- 지영미 (충남대학교 자연과학대학 생물학과) ;
- 유민 (계명대학교 생물학과) ;
- 이순철 (충남대학교 약학대학 약학과) ;
- 유관희 (충남대학교 자연과학대학 생물학과)
- Published : 2000.03.01
Abstract
SNAP-25 was first investigated as a neuron-specific protein preferentially expressed in CA3 pyramidal neurons of mouse hippocampus. It is a presynaptic plasma membrane protein in the nerve cell and plays an important role in the synaptic vesicle membrane docking and fusion pathway. We have recently isolated SNAP-25 cDNA from a rat brain cDNA library using a probe of Z2 cDNA. It consisted of 2,101 bp and an open reading frame (ORF) was identified between nucleotides (nt) 209 and 827. The AUG codon (nt 209∼211) was surrounded by CTACCATGG, which corresponded to the consensus sequence of ribosomal binding site. The ORF was terminated by TAA (nt 827∼829) to encode a polypeptide of 206 amino acid residues. The 3'-untranslated region contained two extensive stretches of repeated (CA)28 and (CA)19 at positions 925∼980 and 1645∼1682. It is noteworthy that cysteine residues were clustered in the span of amino acid residues 84∼991 : Cys-Gly-Leu-Cys-Val-Cys-Pro-Cys. Rat SNAP-25 showed 88% and 97% identity in nucleotide sequences to that of human and mouse, respectively. Amino acid sequence of rat SNAP-25 showed 100% identity to that of mouse and human SNAP-21.
SNAP-25는 presynaptic plasma membrane에 위치하는 단백질로서 synaptic vesicle의 docking과 fusion에 있어서 매우 중요한 역할을 한다. 생쥐 SNAP-25