The gram-negative organism Pseudomonas aeruginosa is an opportunistic human pathogen and a leading cause of hospital-acquired infections. In P. aeruginosa PAO1, three cytoplasmic thioredoxins have been identified. An unusual thioredoxin (Patrx2) (108 amino acids) encoded by the PA2694 gene, is identified as a new thioredoxin-like protein based on sequence homology. Thioredoxin is a ubiquitous protein, which serves as a general protein disulfide oxidoreductase. Patrx2 present an atypical active site CGHC. We report the nearly complete 1H, 13C and 15N resonance assignments of reduced Patrx2. 2D and 3D heteronuclear NMR experiments were performed with uniformly 15N-, 13C-labelled Patrx2, resulting in 97.2 % backbone and 92.5 % side-chain 1H, 13C and 15N resonance assignments for the reduced form.