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从普通小麦(Triticum aestivum L.)中分离了一个类核糖核酸酶(WRN1)基因的cDNA。WRN1的转录受自然衰老和黑暗诱导衰老的负调控。在幼嫩组织中WRN1也有表达。由于在两个保守的位置上组氨酸被替换,WRN1很可能已经失去了核糖核酸酶的活性。 Southern分析表明,在普通小麦基因组中,WRN1以一个小基因家族的形式存在。
A cDNA encoding the ribonuclease (WRN1) gene was isolated from common wheat (Triticum aestivum L.). WRN1 transcription is negatively regulated by natural aging and dark-induced senescence. WRN1 is also expressed in young tissues. WRN1 is likely to have lost ribonuclease activity due to histidine substitution at two conserved positions. Southern analysis showed that WRN1 exists as a small gene family in the common wheat genome.