Light-associated and Processing-dependent Protein Binding to 5′ Regions of rbcL mRNA in the Chloroplasts of a C4 Plant*

Light-associated and Processing-dependent Protein Binding to 5′ Regions of rbcL mRNA in the Chloroplasts of a C4 Plant*
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与 C4 植物叶绿体中 rbcL mRNA 5 区域的光相关和加工依赖性蛋白结合*

DOI:
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发表时间:
2001
影响因子:
4.8
通讯作者:
J. O. Berry
J. O. Berry
中科院分区:
生物学2区
文献类型:
--
作者:
D. McCormac;Hanz Litz;Jianxin Wang;P. Gollnick;J. O. Berry

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在苋菜这种c4双子叶植物中,质体rbcL基因(编码核酮糖-1,5-二磷酸羧化酶的大亚基)在许多发育过程中受到转录后调控,包括光介导的发育。为了确定rbcL表达的转录后调控因子,采用了三种分析方法(多聚体脚跟印刷、凝胶阻滞和紫外线交联)。这些方法表明,在光生长的苋菜植物中,多种蛋白质与rbcl mRNA的5 '区相互作用,而不是黄化的苋菜植物。通过紫外交联观察到47-kDa蛋白(p47)的光相关结合对rbcL 5 ' RNA具有高度特异性。p47仅与成熟加工rbcL转录本(5 ' -未翻译区(UTR)在−66处终止)对应的rna结合;具有较长5 ' - utr的转录本在体外不与p47相关。bcl 5 ‘ -UTR长度的变化被发现在体内发生,这些不同的5 ’末端可能阻止或增强光相关p47结合,可能也影响rbcL表达。p47的结合与光合叶片和子叶中完全加工转录本的光依赖性rbcL多体结合相关,但与束鞘和叶肉叶绿体中细胞特异性rbcL mRNA的积累无关。
In amaranth, a C4dicotyledonous plant, the plastid rbcL gene (encoding the large subunit of ribulose-1,5-bisphosphate carboxylase) is regulated post-transcriptionally during many developmental processes, including light-mediated development. To identify post-transcriptional regulators of rbcL expression, three types of analyses (polysome heel printing, gel retardation, and UV cross-linking) were utilized. These approaches revealed that multiple proteins interact with 5′ regions ofrbcL mRNA in light-grown, but not etiolated, amaranth plants. Light-associated binding of a 47-kDa protein (p47), observed by UV cross-linking, was highly specific for the rbcL 5′ RNA. Binding of p47 occurred only with RNAs corresponding to mature processed rbcL transcripts (5′-untranslated region (UTR) terminating at −66); transcripts with longer 5′-UTRs did not associate with p47 in vitro. Variations in the length of therbcL 5′-UTR were found to occur in vivo, and these different 5′ termini may prevent or enhance light-associated p47 binding, possibly affecting rbcL expression as well. p47 binding correlates with light-dependent rbcL polysome association of the fully processed transcripts in photosynthetic leaves and cotyledons but not with cell-specificrbcL mRNA accumulation in bundle sheath and mesophyll chloroplasts.
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Koo,JS;Spremulli,LL
通讯作者: Spremulli,LL
DOI: 10.1126/science.278.5345.1954
发表时间: 1997-12-12
期刊: SCIENCE
影响因子: 56.9
作者:
Kim, JM;Mayfield, SP
通讯作者: Mayfield, SP
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Koo,JS;Spremulli,LL
通讯作者: Spremulli,LL
DOI: 10.1016/0076-6879(86)18077-3
发表时间: 1986
影响因子: --
作者:
W. Gruissem;B. Greenberg;G. Zurawski;R. Hallick
通讯作者: W. Gruissem;B. Greenberg;G. Zurawski;R. Hallick
DOI: 10.1002/j.1460-2075.1988.tb03233.x
发表时间: 1988-11-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
WOLIN, SL;WALTER, P
通讯作者: WALTER, P