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Luteimonas dalianensis sp. nov., an Obligate Marine Bacterium Isolated from Seawater
Yanjuan Xin,Xupeng Cao,Peichun Wu,Song Xue 한국미생물학회 2014 The journal of microbiology Vol.52 No.9
A marine bacterial strain, designated OB44-3T, was isolatedfrom a crude oil-contaminated seawater sample collectednear Dalian Bay, China. Cells of strain OB44-3T were Gramnegative,aerobic, rod-shaped, and oxidase- and catalasepositive. The major fatty acids were branched-chain saturatediso-C15:0 (27.9%) and unsaturated iso-C17:1 ω9c (14.8%). The DNA G+C content was 64.6 mol%. Phylogenetic analysisbased on the 16S rRNA gene sequence indicated thatstrain OB44-3T was a member of the genus Luteimonas (95–96% 16S rRNA gene sequence similarity); its closest neighborswere the type strains of Luteimonas terricola (96% sequencesimilarity), Luteimonas mephitis (96%), and Luteimonaslutimaris (96%). On the basis of phenotypic, chemotaxonomic,and phylogenetic distinctiveness, strain OB44-3Twas considered to represent a novel species of the genusLuteimonas. The name Luteimonas dalianensis sp. nov. isproposed, with strain OB44-3T (=CGMCC 1.12191T =JCM18136T) as the type strain.
Cytogenetical Identification in Seven Species of Elytrigia Desv.
Mao Peisheng,Wang Xinguo,Huang Ying,Meng Lin,Mao Peichun 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08
The ploid level of 46 germplasms of Elytrigia Desv. were observed and determined with the microscope, which are from 21 countries and areas that United States of America offered. The results showed these accessions were grouped into three distinct ploid levels including diploidy, tetraploidy and hexaploidy in E. intermedia, E. repens, E. elongata, E. pontica, E. caespitosa, E. juncea, E. alatavica. There were 24 diploid accessions, 1 tetraploidy and 1 hexaploidy in E. intermedia; 4 diploid accessions and 3 tetraploidy in E. repens, 6 texaploidy and 1 hexaploidy in E. elongata, 1 diploidy and 2 tetraploidy in E. pontica, all of E. caespitosa, E. juncea and E. alatavica were diploidy.
Zhu, Qiankun,Zhu, Mengli,Fan, Gaotao,Zou, Jiaxin,Feng, Peichun,Liu, Zubi,Wang, Wanjun Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.1
Coptis chinensis 3'-hydroxy-N-methylcoclaurine 4'-O-methyltransferase (HOMT), an essential enzyme in the berberine biosynthetic pathway, catalyzes the methylation of 3'-hydroxy-N-methylcoclaurine (HMC) producing reticuline. A 3D model of HOMT was constructed by homology modeling and further subjected to docking with its ligands and molecular dynamics simulations. The 3D structure of HOMT revealed unique structural features which permitted the methylation of HMC. The methylation of HMC was proposed to proceed by deprotonation of the 4'-hydroxyl group via His257 and Asp258 of HOMT, followed by a nucleophilic attack on the SAM-methyl group resulting in reticuline. HOMT showed high substrate specificity for methylation of HMC. The study evidenced that Gly117, Thr312 and Asp258 in HOMT might be the key residues for orienting substrate for specific catalysis.
Qiankun Zhu,Mengli Zhu,Gaotao Fan,Jiaxin Zou,Peichun Feng,Zubi Liu,Wanjun Wang 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.1
Coptis chinensis 3'-hydroxy-N-methylcoclaurine 4'-O-methyltransferase (HOMT), an essential enzyme in the berberine biosynthetic pathway, catalyzes the methylation of 3'-hydroxy-N-methylcoclaurine (HMC) producing reticuline. A 3D model of HOMT was constructed by homology modeling and further subjected to docking with its ligands and molecular dynamics simulations. The 3D structure of HOMT revealed unique structural features which permitted the methylation of HMC. The methylation of HMC was proposed to proceed by deprotonation of the 4'-hydroxyl group via His257 and Asp258 of HOMT, followed by a nucleophilic attack on the SAM-methyl group resulting in reticuline. HOMT showed high substrate specificity for methylation of HMC. The study evidenced that Gly117, Thr312 and Asp258 in HOMT might be the key residues for orienting substrate for specific catalysis.