Spaltung einer serinspezifischen transfer-ribonucleinsäure-fraktion mit T1-ribonuclease

D. Dütting, H.G. Zachau
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引用次数: 13

Abstract

Soluble RNA and a serine specific transfer RNA fraction were digested by highly purified T1-RNAase (ribonucleate 3′-guanylohydrolase, EC 3.1.4.8) and phosphomonoesterase (orthophosphoric monoester phosphohydrolase, EC 3.1.3.1). Conditions for the separation of the oligonucleotides on DEAE-cellulose columns were worked out with digests of soluble RNA (Fig. 1–3). The splitting products of the serine-transfer-RNA fraction were separated (Fig. 4) and further purified by paper electrophoresis. Their nucleotide composition — including the odd nucleotides — was determined by conventional methods and the sequences partially elucidated. 5 Di-, 6 tri-, 7 tetra-, 2 penta- and 1 hexanucleotide of the two serine-transfer-RNA chains were identified (Table I) and quantitatively determined (Table II). One longer oligonucleotide was partially identified. Some oligonucleotides, which are present in small amounts, were due to impurities in the serine-transfer-RNA sample.

巴斯克分离党
用高纯度的T1-RNAase(核糖核酸3′-鸟苷水解酶,EC 3.1.4.8)和磷酸单酯酶(正磷酸单酯磷酸水解酶,EC 3.1.3.1)消化可溶性RNA和丝氨酸特异性转移RNA。通过可溶性RNA的酶切,确定了deae -纤维素柱上分离寡核苷酸的条件(图1-3)。分离丝氨酸转移rna片段的分裂产物(图4),并通过纸电泳进一步纯化。它们的核苷酸组成——包括奇数核苷酸——是用常规方法确定的,序列部分被阐明。鉴定了两条丝氨酸转移rna链中的5个二核苷酸、6个三核苷酸、7个四核苷酸、2个五核苷酸和1个六核苷酸(表1)并进行了定量测定(表2)。部分鉴定了一个较长的寡核苷酸。少量存在的一些寡核苷酸是由于丝氨酸转移rna样品中的杂质造成的。
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