HIGH-RESOLUTION MAPPING OF GENETIC-LOCI OF ANABAENA PCC-7120 REQUIRED FOR PHOTOSYNTHESIS AND NITROGEN-FIXATION

被引:26
作者
KURITZ, T [1 ]
ERNST, A [1 ]
BLACK, TA [1 ]
WOLK, CP [1 ]
机构
[1] MICHIGAN STATE UNIV, US DOE, PLANT RES LAB, E LANSING, MI 48824 USA
关键词
D O I
10.1111/j.1365-2958.1993.tb01207.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A physical map of the Anabaena genome permitted the localization of its genes to chromosomal fragments generated by rarely cutting restriction endonucleases and separated by pulsed-field gel electrophoresis. We introduce a novel means of mapping more precisely to c. 20 kb by use of rare restriction sites within vectors bearing cloned sequences that undergo homologous recombination with the genome. We thereby localize and orient genes encoding principal photosynthetic pigments. The relative spacing of loci within a single restriction fragment was determined with even higher resolution, as illustrated for genes required for heterocyst development and nitrogen fixation that were marked with transposons. Small, newly visualized restriction fragments of the chromosome were also mapped.
引用
收藏
页码:101 / 110
页数:10
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