RT Journal Article SR Electronic(1) A1 Lu, Guang-Tao A1 Xie, Jia-Ri A1 Chen, Lei A1 Hu, Jiang-Ru A1 An, Shi-Qi A1 Su, Hui-Zhao A1 Feng, Jia-Xun A1 He, Yong-Qiang A1 Jiang, Bo-Le A1 Tang, Dong-Jie A1 Tang, Ji-LiangYR 2009 T1 Glyceraldehyde-3-phosphate dehydrogenase of Xanthomonas campestris pv. campestris is required for extracellular polysaccharide production and full virulence JF Microbiology, VO 155 IS 5 SP 1602 OP 1612 DO https://doi.org/10.1099/mic.0.023762-0 PB Microbiology Society, SN 1465-2080, AB Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) plays an important role in glucose catabolism, converting glyceraldehyde 3-phosphates to 1,3-bisphosphoglycerates. Open reading frame (ORF) XC_0972 in the genome of Xanthomonas campestris pv. campestris (Xcc) strain 8004 is the only ORF in this strain annotated to encode a GAPDH. In this work, we have demonstrated genetically that this ORF encodes a unique GAPDH in Xcc strain 8004, which seems to be constitutively expressed. A GAPDH-deficient mutant could still grow in medium with glucose or other sugars as the sole carbon source, and no phosphofructokinase activity was detectable in strain 8004. These facts suggest that Xcc may employ the Entner–Doudoroff pathway, but not glycolysis, to utilize glucose. The mutant could not utilize pyruvate as sole carbon source, whereas the wild-type could, implying that the GAPDH of Xcc is involved in gluconeogenesis. Furthermore, inactivation of the Xcc GAPDH resulted in impairment of bacterial growth and virulence in the host plant, and reduction of intracellular ATP and extracellular polysaccharide (EPS). This reveals that GAPDH is required for EPS production and full pathogenicity of Xcc., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.023762-0