Characterization of a chlorella virus PBCV-1 encoded ribonuclease III.
Characterization of a chlorella virus PBCV-1 encoded ribonuclease III.
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小球藻病毒 PBCV-1 编码核糖核酸酶 III 的表征。
DOI:
10.1016/j.virol.2003.08.044
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发表时间:
2003
期刊:
影响因子:
3.7
通讯作者:
VanEtten,JamesL
中科院分区:
文献类型:
--
作者:
Zhang,Yuanzheng;Calin-Jageman,Irina;Gurnon,JamesR;Choi,Tae-Jin;Adams,Byron;Nicholson,AllenW;VanEtten,JamesL
Sequence analysis of the 330-kb genome of chlorella virus PBCV-1 revealed an open reading frame, A464R, which encodes a protein with 30–35% amino acid identity to ribonuclease III (RNase III) from many bacteria. The a464r gene was cloned and the protein was expressed in Escherichia coli using the chitin-binding intein system. The recombinant PBCV-1 RNase III cleaves model dsRNA substrates, in a Mg2+-dependent manner, into a defined set of products. The substrate cleavage specificity overlaps, but is nonidentical to that of E. coli RNase III. The a464r gene is expressed very early during PBCV-1 infection, within 5–10 min p.i. The RNase III protein appears at 15 min p.i. and disappears by 120 min p.i. The a464r gene is highly conserved among the chlorella viruses. Phylogenetic analyses indicate that the PBCV enzyme is most closely related to Mycoplasma pneumoniae RNase III.
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影响因子:
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通讯作者:
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影响因子:
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作者:
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作者:
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作者:
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通讯作者:
R. Meints
DOI:
--
发表时间:
1972
影响因子:
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作者:
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通讯作者:
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