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慢生根瘤菌血清群123的高度重复DNA区域HRS1，与来自巴氏醋杆菌的插入序列IS1380具有DNA和氨基酸序列同源性。

The Bradyrhizobium japonicum serocluster 123 hyperreiterated DNA region, HRS1, has DNA and amino acid sequence homology to IS1380, an insertion sequence from Acetobacter pasteurianus.

作者信息

Judd A K, Sadowsky M J

机构信息

Soil Science Department, University of Minnesota, St. Paul 55108.

出版信息

Appl Environ Microbiol. 1993 May;59(5):1656-61. doi: 10.1128/aem.59.5.1656-1661.1993.

DOI:10.1128/aem.59.5.1656-1661.1993
PMID:8390818
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC182133/
Abstract

We have sequenced and analyzed the hyperreiterated DNA region, HRS1, from Bradyrhizobium japonicum USDA 424. The 2.1-kb HRS1 fragment is closely linked to the B. japonicum common and genotype-specific nodulation genes in serogroup 123 and 127 strains. Southern hybridization analyses indicated that one copy of HRS1 is also located next to the fixRnifA locus in B. japonicum USDA 424. Nucleotide sequence analysis revealed the presence of a 4-bp target site duplication in HRS1 which is identical to a terminal repeat found in the B. japonicum USDA 110 repeated sequence RS alpha. Computer searches of the PIR (Protein Identification Resource) protein data base revealed a high degree of amino acid sequence homology between a putative 329-amino-acid polypeptide from HRS1 and a large polypeptide from IS1380, an insertion sequence from Acetobacter pasteurianus. RNA slot blot hybridizations suggest that transcripts showing homology to HRS1 are constitutively produced in strains USDA 424 (serogroup 127) and USDA 438 (serogroup 123).

摘要

我们对来自日本慢生根瘤菌USDA 424的高度重复DNA区域HRS1进行了测序和分析。这个2.1kb的HRS1片段与123和127血清群菌株中的日本慢生根瘤菌共有及基因型特异性结瘤基因紧密连锁。Southern杂交分析表明，在日本慢生根瘤菌USDA 424中，一个HRS1拷贝也位于fixRnifA基因座旁边。核苷酸序列分析显示，HRS1中存在一个4bp的靶位点重复，它与日本慢生根瘤菌USDA 110重复序列RSα中的末端重复序列相同。对PIR（蛋白质识别资源）蛋白质数据库的计算机搜索显示，HRS1中一个假定的329个氨基酸的多肽与巴斯德醋杆菌的插入序列IS1380中的一个大的多肽之间存在高度的氨基酸序列同源性。RNA斑点杂交表明，与HRS1具有同源性的转录本在USDA 424（127血清群）和USDA 438（123血清群）菌株中组成性产生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd7/182133/452b159eabdf/aem00034-0413-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd7/182133/8b9abf18ebba/aem00034-0413-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd7/182133/452b159eabdf/aem00034-0413-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd7/182133/8b9abf18ebba/aem00034-0413-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd7/182133/452b159eabdf/aem00034-0413-b.jpg

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Genetic Diversity in Bradyrhizobium japonicum Serogroup 123 and Its Relation to Genotype-Specific Nodulation of Soybean.大豆根瘤菌 123 血清群遗传多样性及其与基因型专化性结瘤的关系。
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结核分枝杆菌复合群中IS900家族新成员IS1547的特性及其与IS6110的关联
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