Proline utilization A

Function

Proline utilization A (PutA) is a bifunctional flavoprotein which acts as a transcriptional repressor of the put regulon or as a membrane-bound enzyme which catalyzes the oxidation of proline to glutamate. PutA domains include the DNA-binding domain (PRODH), the FAD-dependent proline dehydrogenase domain and the D-pyrroline-5-carboxylate dehydrogenase domain. The binding of proline to the PRODH active site and subsequent reduction of FAD causes a conformation change in PutA and enhance its membrane affinity. As a membrane-bound protein PutA switches from its repressor activity to its enzymatic role^[1].

Structural highlights

E. coli PutA proline dehydrogenase domain with cofactor FAD complex with proline (PDB code 2fzn

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3D Structures of proline utilization A3D Structures of proline utilization A

Updated on 12-July-2016

4nm9 – GsPutA + FAD – Geobacter sulfurreducens
4nma – GsPutA + FAD + tetrahydrofuran derivative
4nmb – GsPutA + FAD + lactate
4nmc – GsPutA + FAD + zwittergent
4nmd – GsPutA + FAD + dithionite
4nme – GsPutA + FAD + propargylglycine
4nmf – GsPutA + FAD derivative + menadione bisulfite
1tiw – EcPutA PRODH domain + FAD + tetrahydrofuran derivative – Escherichia coli
3e2r, 4jny, 4jnz – EcPutA PRODH domain (mutant) + FAD + tetrahydrofuran derivative
1tj0, 1tj1 – EcPutA PRODH domain + FAD + lactate
1tj2 – EcPutA PRODH domain + FAD + acetate
2fzn – EcPutA PRODH domain + FAD + proline
3e2q, 3e2s – EcPutA PRODH domain (mutant) + FAD + proline derivative
2fzm – EcPutA PRODH domain + FAD + SO2
3itg – EcPutA PRODH domain + FAD + propargylglycine
2gpe – EcPutA DNA-binding domain
2ay0 – EcPutA DNA-binding domain (mutant)
2rbf – EcPutA DNA-binding domain + DNA
4o8a – EcPutA DNA-binding + PRODH domains + FAD

ReferencesReferences

↑ Srivastava D, Zhu W, Johnson WH, Whitman CP, Becker DF, Tanner JJ. The Structure of the Proline Utilization A Proline Dehydrogenase Domain Inactivated by N-Propargylglycine Provides Insight into Conformational Changes Induced by Substrate Binding and Flavin Reduction (,). Biochemistry. 2009 Dec 29. PMID:19994913 doi:10.1021/bi901717s

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Michal Harel, Alexander Berchansky, Joel L. Sussman

[1] Srivastava D, Zhu W, Johnson WH, Whitman CP, Becker DF, Tanner JJ. The Structure of the Proline Utilization A Proline Dehydrogenase Domain Inactivated by N-Propargylglycine Provides Insight into Conformational Changes Induced by Substrate Binding and Flavin Reduction (,). Biochemistry. 2009 Dec 29. PMID:19994913 doi:10.1021/bi901717s

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