title: Isolation and characterization of curdlan produced by Agrobacterium HX1126 using α-lactose as substrate.
abstract: A strain Agrobacterium HX1126 was isolated from soil sample near the canal in Wuxi. α-lactose was used as the sole carbon source for the production of an exopolysaccharide which was named PLHX. The highest production of PLHX (21.4g/L) was obtained under nitrogen depletion. PLHX composed mainly of glucose, with lower amounts of galactose and aminogalactose. The structure of the product was confirmed by NMR and FTIR and was identified as curdlan. This exopolysaccharide formed a gel when 30g/L was put in boiling water for 10min, with an achieved gel strength of 831g/cm(2). Moreover, a hypothesis for higher gel strength production is proposed. The gel forming property makes this exopolysaccaride a good potential application in the food, pharmaceutical and cosmetic industries.
authors: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China. Electronic address: liuym82@163.com.
authors: Yongmei
authors: Y
authors: Liu
authors: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
authors: Qiuya
authors: Q
authors: Gu
authors: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
authors: Fred Kwame
authors: FK
authors: Ofosu
authors: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China. Electronic address: princess090326@163.com.
authors: Xiaobin
authors: X
authors: Yu
mesh_terms: D060054:Agrobacterium / Q000737:chemistry* / Q000145:classification / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D018533:Biomass; D002152:Calorimetry, Differential Scanning; D005285:Fermentation; D007785:Lactose / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000737:chemistry / Q000235:genetics; D017550:Spectroscopy, Fourier Transform Infrared; D047071:beta-Glucans / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D012336:RNA, Ribosomal, 16S; D047071:beta-Glucans; C038459:curdlan; D007785:Lactose
keywords: Agrobacterium HX1126; Curdlan; α-lactose