An evaluation of chelex-based DNA purification protocols for the typing of lactic acid bacteria

被引:113
作者
Giraffa, G [1 ]
Rossetti, L [1 ]
Neviani, E [1 ]
机构
[1] Ist Sperimentale Lattiero Caseario, I-26900 Lodi, Italy
关键词
bacterial taxonomy; diagnostic microbiology; DNA extraction; polymerase chain reaction (PCR) fingerprinting; lactic acid bacteria;
D O I
10.1016/S0167-7012(00)00172-X
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
An easy and rapid protocol to extract DNA to be used as template for polymerase chain reaction (PCR) fingerprinting experiments from cultivable lactic acid bacteria (LAB) is proposed. Different procedures for rapid extraction of DNA by chelex (iminodiacetid acid) ionic resin were compared. Factors affecting the quality and reproducibility of PCR fingerprinting profiles were also investigated. Two out of three chelex-based protocols allowed to obtain DNA samples which, after PCR amplification, provided electrophoretic patterns comparable with those obtained by classical lysozyme and phenol-chloroform DNA extraction. A good level of reproducibility and consistency of the InstaGene procedure was verified. The procedure is fast, practical, and the DNA is of quality similar to that obtained by phenol-chloroform extraction. Although applied to a little number of LAB strains, chelex-based protocols are potentially applicable to a vast array of organisms and/or biological materials. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:175 / 184
页数:10
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