CLONING AND ANALYSIS OF BIOCHEMICAL AND CATALYTIC PROPERTIES OF DNA METHYLTRANSFERASE M1.BspACI
https://doi.org/10.1234/XXXX-XXXX-2011-2-38-40
Abstract
Genes coding for the DNA methyltransferases of restriction-modification system BspACI from Bacillus psychrodurans AC have been cloned in E. coli cells. The analysis of amino acid se- quences of the proteins showed that both these genes belong to C5 DNA methyltransferases. Gene bspACIM1 has been subcloned in pJW2 vector. High-purity recombinant enzyme has been obtained with chromatography on different carriers. It has been shown that M1.BspACI modifies the first cytosine residue in the sequence 5ґ-CCGC-3ґ. Kinetic parameters have been determined. The cata- lytic constant appears to be 0,095 ± 0,002 min–1, Km ДНК фага — 0,053 ± 0,007 мкМ, Km SAM — 5,1 ± 0,3 мкМ.
About the Authors
M. V. TarasovaRussian Federation
V. V. Kuznetsov
Russian Federation
N. A. Netesova
Russian Federation
D. А. Gonchar
Russian Federation
S. Kh. Degtyarev
Russian Federation
References
1. Тарасова М.В. и др. Новая сайт-специфическая эндонуклеаза BspACI из Bacillus psychrodurans AC узнает последовательность 5ґ-CCGC-3ґ/3ґ-GGCG-5ґ // Вестн. биотехнол. и физ.-хим. биол. 2010. Т. 5. № 1. С. 16—24.
2. Sambrook J. et al. Molecular cloning: a laboratory manual. New York: Cold Spring Harbor Laboratory Press, 1989. 1659 с.
3. Чернухин В.А. и др. Рекомбинантная ДНК-метилтрансфераза M2.BstSEI из никазнометилазной системы NM.BstSEI: получение и свойства // Мол. биол. 2009. Т. 43. № 1. С. 10—18.
4. Kossykh V.G. et al. Function of Pro-185 in the ProCys of conserved motif IV in the EcoRII [cytosine-C5]-DNA me- thyltransferase // FEBS Lett. 1995. Vol. 370. N 1—2. P. 75—77.
5. Lee K.F. et al. Overproduction, purification and characterization of M.EcoHK31I, a bacterial methyltransferase with two polypeptides // Biochem. J. 1996. Vol. 314. N 1. P. 321—326.
6. Bhattacharya S.K. et al. Kinetic mechanism of cytosine DNA methyltransferase MspI // J. Biol.Chem. 1999. Vol. 274. N 21. P. 14743—14749.
Review
For citations:
Tarasova M.V., Kuznetsov V.V., Netesova N.A., Gonchar D.А., Degtyarev S.Kh. CLONING AND ANALYSIS OF BIOCHEMICAL AND CATALYTIC PROPERTIES OF DNA METHYLTRANSFERASE M1.BspACI. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2011;(2):38-40. (In Russ.) https://doi.org/10.1234/XXXX-XXXX-2011-2-38-40