Purification and Characterisation of a Tissue Specific Elongation Factor 1 Alpha (EF-1α2) from Rabbit Muscle

Purification and Characterisation of a Tissue Specific Elongation Factor 1 Alpha (EF-1α2) from Rabbit Muscle
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兔肌肉组织特异性伸长因子 1 Alpha (EF-1α2) 的纯化和表征

DOI:
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发表时间:
1998
期刊:
影响因子:
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通讯作者:
W. C. Merrick
W. C. Merrick
中科院分区:
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文献类型:
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作者:
P. Kristensen;A. Lund;B. F. Clark;J. Cavallius;W. C. Merrick

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摘要肽延伸因子1 α(EF-1α)已从许多物种中分离和鉴定。最近,我们和其他人报道了在高等真核生物(包括人类细胞)中普遍表达的EF-1α mRNA的同种型的存在。这种亚型具有组织特异性表达模式,主要局限于肌肉、心脏和脑。本研究从家兔肌肉中纯化了EF-1α的亚型。使用部分氨基酸分析,我们可以得出结论,在兔肌肉中,基本上只有延伸因子1 α的同种型(命名为EF-1α2)被翻译。初步活性测定表明,该亚型与正常EF-1α(命名为EF-1α1)在蛋白质合成方面具有相同的功能活性,但在结合核苷酸的能力方面可能表现不同。基于从哺乳动物物种中纯化的EF-1α亚型的可用性,将有可能进行进一步的比较研究,以阐明EF-1α1和EF-1α2蛋白的不同功能。
Abstract The peptide elongation factor 1 alpha (EF-1α) has been isolated and characterised from a number of species. Recently we and others have reported the existence of an isoform of the ubiquitously expressed EF-1α mRNA in higher eukaryotes, including human cells. This isoform has a tissue specific expression pattern, confining it primarily to muscle, heart, and brain. In the present study we have purified the isoform of EF-1α from rabbit muscle. Using partial amino acid analysis, we can conclude that in rabbit muscle essentially only the isoform of elongation factor 1 alpha, designated EF-1α2, is translated. Preliminary activity assays show that the isoform has the same functional activities as the normal EF-1α, designated EF-1α1, in relation to protein synthesis, but may behave differently in the ability to bind nucleotides. Based on the availability of the isoforms of EF-1α purified from a mammalian species, it will be possible to conduct further comparative studies in order to elucidate the different functions of EF-1α1 and EF-1α2 proteins.
DOI: 10.1016/s0021-9258(18)71682-7
发表时间: 1989-08
期刊: The Journal of biological chemistry
影响因子: --
作者:
S. Whiteheart;P. Shenbagamurthi;Ling Chen;R. Cotter;G. Hart
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发表时间: 1993-11
期刊: The Journal of biological chemistry
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发表时间: 1989-12
期刊: The Journal of biological chemistry
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DOI: 10.1016/0167-4781(90)90173-y
发表时间: 1990
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Merrick,WC;Dever,TE;Kinzy,TG;Conroy,SC;Cavallius,J;Owens,CL
通讯作者: Owens,CL