3NIO

Crystal structure of Pseudomonas aeruginosa guanidinobutyrase

Summary for 3NIO

• Entry DOI: 10.2210/pdb3nio/pdb
• Related: 3NIP 3NIQ
• Descriptor: Guanidinobutyrase, MANGANESE (II) ION (3 entities in total)
• Functional Keywords: pa1421, guanidinobutyrase, gbua, hydrolase
• Biological source: Pseudomonas aeruginosa
• Total number of polymer chains: 6
• Total formula weight: 210395.51

Authors

Lee, S.J.,Kim, H.S.,Kim, D.J.,Yoon, H.J.,Kim, K.H.,Yoon, J.Y.,Jang, J.Y.,Im, H.,An, D.,Suh, S.W. (deposition date: 2010-06-16, release date: 2011-06-01, Last modification date: 2023-11-01)

Primary citation

Lee, S.J.,Kim, D.J.,Kim, H.S.,Lee, B.I.,Yoon, H.J.,Yoon, J.Y.,Kim, K.H.,Jang, J.Y.,Im, H.N.,An, D.R.,Song, J.S.,Kim, H.J.,Suh, S.W.
Crystal structures of Pseudomonas aeruginosa guanidinobutyrase and guanidinopropionase, members of the ureohydrolase superfamily
J.Struct.Biol., 175:329-338, 2011

PubMed Abstract: Pseudomonas aeruginosa guanidinobutyrase (GbuA) and guanidinopropionase (GpuA) catalyze the hydrolysis of 4-guanidinobutyrate and 3-guanidinopropionate, respectively. They belong to the ureohydrolase superfamily, which includes arginase, agmatinase, proclavaminate amidinohydrolase, and formiminoglutamase. In this study, we have determined the crystal structures of GbuA and GpuA from P. aeruginosa to provide a structural insight into their substrate specificity. Although GbuA and GpuA share a common structural fold of the typical ureohydrolase superfamily, they exhibit significant variations in two active site loops. Mutagenesis of Met161 of GbuA and Tyr157 of GpuA, both of which are located in the active site loop 1 and predicted to be involved in substrate recognition, significantly affected their enzymatic properties, implying their important roles in catalysis.

PubMed: 21600989
DOI: 10.1016/j.jsb.2011.05.002

Experimental method

X-RAY DIFFRACTION (2 Å)