EXPRESSION OF NUCLEAR TRANSFER RNATYR GENES FROM ARABIDOPSIS-THALIANA IN HELA-CELL AND WHEAT-GERM EXTRACTS

被引：35

作者：

STANGE, N ^{[1
]}

BEIER, D ^{[1
]}

BEIER, H ^{[1
]}

机构：

[1] UNIV WURZBURG,INST BIOCHEM,RONTGENRING 11,W-8700 WURZBURG,GERMANY

来源：

PLANT MOLECULAR BIOLOGY | 1991年 / 16卷 / 05期

关键词：

ARABIDOPSIS; TYROSINE TRANSFER RNA GENES; INVITRO TRANSCRIPTION; INVITRO PROCESSING; PSEUDOGENES; SPLICING;

D O I：

10.1007/BF00015078

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：

The transcription of thirteen Arabidopsis tRNA(Tyr) genes in a tRNA gene cluster was studied in HeLa cell nuclear extracts. All tRNA(Tyr) genes are efficiently transcribed. Initiation of transcription starts at adenosine residues at positions -5 or -6, and termination occurs at an oligo(T) stretch located 17 to 21 bp downstream of the 3' end of the structural genes depending on the gene studied. Maturation of intron-containing pre-tRNAs was compared in HeLa cell and wheat germ extracts and revealed that 5' and 3' end processing precedes splicing in both systems. Two pre-tRNAs which carry mutations in the mature domain are not processed at all in the HeLa extract, whereas one of them matures with low efficiency in the wheat germ extract. The thirteen pre-tRNAs(Tyr) possess highly conserved intron sequences of 12 nucleotides. Twelve of these introns are efficiently excised, whereas one is removed at a reduced rate, possibly due to a slightly destablized extended anticodon stem.

引用

页码：865 / 875

页数：11

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