Hin4II, a new prototype restriction endonuclease from Haemophilus influenzae RFL4:: Discovery, cloning and expression in Escherichia coli

被引:8
作者
Azarinskas, Audrius
Maneliene, Zita
Jakubauskas, Arturas
机构
[1] Inst Biotechnol, LT-02241 Vilnius, Lithuania
[2] Fermentas UAB, LT-02241 Vilnius, Lithuania
关键词
Hin4II; restriction endonuclease; subtype IIS; Haemophilus influenzae; HNH nuclease family; restriction-modification;
D O I
10.1016/j.jbiotec.2005.12.016
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The genes encoding restriction-modification system of unknown specificity Hin4II from Haemophilus influenzae RFL4 were cloned in Escherichia coli and sequenced. The Hin4II system comprises three tandemly arranged genes coding for m6A DNA methyltransferase, m5C DNA methyltransferase and restriction endonuclease, respectively. Restriction endonuclease was expressed in E. coli and purified to apparent homogeneity. The DNA recognition sequence and cleavage positions were determined. R.Hin4II recognizes the novel non-palindromic sequence 5'-CCTTC-3' and cleaves the DNA 6 and 5 nt downstream in the top and bottom strand, respectively. The new prototype restriction endonuclease Hin4II was classified as a potential candidate of HNH nuclease family after comparison against SMART database. An amino acid sequence motif 297H-X-14-N-X-8-H of Hin4II was proposed as forming a putative catalytic center. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:288 / 296
页数:9
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