Serveur d'exploration sur l'esturgeon

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Molecular cloning, sequencing, expression of Chinese sturgeon cystatin in yeast Pichia pastoris and its proteinase inhibitory activity

Identifieur interne : 000D56 ( Main/Exploration ); précédent : 000D55; suivant : 000D57

Molecular cloning, sequencing, expression of Chinese sturgeon cystatin in yeast Pichia pastoris and its proteinase inhibitory activity

Auteurs : JUNJIE BAI [République populaire de Chine] ; DONGMEI MA [République populaire de Chine] ; HAIHUA LAO [République populaire de Chine] ; QING JIAN [République populaire de Chine] ; XING YE [République populaire de Chine] ; JIANREN LUO [République populaire de Chine] ; XIAOYONG XONG [République populaire de Chine] ; YINGHUA LI [République populaire de Chine] ; XUFANG LIANG [République populaire de Chine]

Source :

RBID : Pascal:06-0390427

Descripteurs français

English descriptors

Abstract

Cystatin, a superfamily of cysteine proteinase inhibitor of cathepsins and other cysteine proteinases, is widely distributed in animal tissues and body fluids. Although considerable attention has been given to mammalian and avian cystatins, little is known about cystatins from other vertebrates. In this study, a cDNA coding for Chinese sturgeon (Acipenser sinensis) cystatin was isolated and characterized. The corresponding mature cystatin peptide cDNA is 336 nucleotides long and encodes a protein of 112 amino acids. Sequence comparison showed that the cloned cystatin was a homolog of the mammalian Family II cystatin. The cystatin cDNA of Chinese sturgeon was subcloned into yeast expression vector pPICZaA and transformed into Pichia pastoris GS115 strain. After methanol induction, SDS-PAGE analysis of the culture supernatant indicated that the yield of recombinant cystatin was about 215 mg/l medium supernatant in shaking-flask fermentation medium, accounting for 73.6% of the total supernatant secreted proteins. Our data also showed that the recombinant cystatin is active in inhibiting the protease activity of papain and cathepsin B. Heat stability of the recombinant cystatin was also measured.


Affiliations:


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<term>Complementary DNA</term>
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<term>Peptidases</term>
<term>Pichia pastoris</term>
<term>Sequencing</term>
<term>Yeast</term>
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<term>Clonage moléculaire</term>
<term>Séquençage</term>
<term>Cystatine</term>
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</teiHeader>
<front>
<div type="abstract" xml:lang="en">Cystatin, a superfamily of cysteine proteinase inhibitor of cathepsins and other cysteine proteinases, is widely distributed in animal tissues and body fluids. Although considerable attention has been given to mammalian and avian cystatins, little is known about cystatins from other vertebrates. In this study, a cDNA coding for Chinese sturgeon (Acipenser sinensis) cystatin was isolated and characterized. The corresponding mature cystatin peptide cDNA is 336 nucleotides long and encodes a protein of 112 amino acids. Sequence comparison showed that the cloned cystatin was a homolog of the mammalian Family II cystatin. The cystatin cDNA of Chinese sturgeon was subcloned into yeast expression vector pPICZaA and transformed into Pichia pastoris GS115 strain. After methanol induction, SDS-PAGE analysis of the culture supernatant indicated that the yield of recombinant cystatin was about 215 mg/l medium supernatant in shaking-flask fermentation medium, accounting for 73.6% of the total supernatant secreted proteins. Our data also showed that the recombinant cystatin is active in inhibiting the protease activity of papain and cathepsin B. Heat stability of the recombinant cystatin was also measured.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>République populaire de Chine</li>
</country>
<region>
<li>Guangdong</li>
</region>
<settlement>
<li>Jiangmen</li>
</settlement>
</list>
<tree>
<country name="République populaire de Chine">
<region name="Guangdong">
<name sortKey="Junjie Bai" sort="Junjie Bai" uniqKey="Junjie Bai" last="Junjie Bai">JUNJIE BAI</name>
</region>
<name sortKey="Dongmei Ma" sort="Dongmei Ma" uniqKey="Dongmei Ma" last="Dongmei Ma">DONGMEI MA</name>
<name sortKey="Dongmei Ma" sort="Dongmei Ma" uniqKey="Dongmei Ma" last="Dongmei Ma">DONGMEI MA</name>
<name sortKey="Haihua Lao" sort="Haihua Lao" uniqKey="Haihua Lao" last="Haihua Lao">HAIHUA LAO</name>
<name sortKey="Jianren Luo" sort="Jianren Luo" uniqKey="Jianren Luo" last="Jianren Luo">JIANREN LUO</name>
<name sortKey="Qing Jian" sort="Qing Jian" uniqKey="Qing Jian" last="Qing Jian">QING JIAN</name>
<name sortKey="Xiaoyong Xong" sort="Xiaoyong Xong" uniqKey="Xiaoyong Xong" last="Xiaoyong Xong">XIAOYONG XONG</name>
<name sortKey="Xiaoyong Xong" sort="Xiaoyong Xong" uniqKey="Xiaoyong Xong" last="Xiaoyong Xong">XIAOYONG XONG</name>
<name sortKey="Xing Ye" sort="Xing Ye" uniqKey="Xing Ye" last="Xing Ye">XING YE</name>
<name sortKey="Xufang Liang" sort="Xufang Liang" uniqKey="Xufang Liang" last="Xufang Liang">XUFANG LIANG</name>
<name sortKey="Yinghua Li" sort="Yinghua Li" uniqKey="Yinghua Li" last="Yinghua Li">YINGHUA LI</name>
<name sortKey="Yinghua Li" sort="Yinghua Li" uniqKey="Yinghua Li" last="Yinghua Li">YINGHUA LI</name>
</country>
</tree>
</affiliations>
</record>

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   |texte=   Molecular cloning, sequencing, expression of Chinese sturgeon cystatin in yeast Pichia pastoris and its proteinase inhibitory activity
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