DNAS OF THE 2 MATING-TYPE ALLELES OF NEUROSPORA-CRASSA ARE HIGHLY DISSIMILAR

被引:155
作者
GLASS, NL [1 ]
VOLLMER, SJ [1 ]
STABEN, C [1 ]
GROTELUESCHEN, J [1 ]
METZENBERG, RL [1 ]
YANOFSKY, C [1 ]
机构
[1] STANFORD UNIV, DEPT BIOL SCI, STANFORD, CA 94305 USA
关键词
D O I
10.1126/science.2840740
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The mating-type alleles A and .alpha. of Neurospora crassa control mating in the sexual cycle and function in establishing heterokaryon incompatibility in the vegetative cycle. The A and a alleles were cloned, and they were shown to encode both the sexual functions and vegetative incompatibility. The mating-type clones contain nonhomologous DNA segments that are flanked by common DNA sequences. Neurospora crassa and all heterothallic and pseudohomothallic Neurospora species contain a single copy of one mating-type sequence or the other within each haploid genome. The six known self-fertile homothallic isolates contain an A homolog, but only one species also contains a homologous sequence. Homothallism in these species is not due to mating-type switching, as it is in Saccharomyces cerevisiae.
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页码:570 / 573
页数:4
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