Conserved water molecules in bacterial serine hydroxymethyltransferases

Area of Science:

• Biochemistry
• Structural Biology
• Enzymology

Background:

• Water molecules within protein interiors play critical roles in structure and function.
• Bacterial serine hydroxymethyltransferases (SHMTs) are pyridoxal-5'-phosphate-dependent enzymes vital for amino acid metabolism.

Purpose of the Study:

• To systematically analyze conserved water molecules in bacterial SHMTs.
• To identify and map structurally conserved water clusters within SHMT protein structures.

Main Methods:

• Utilized ProACT2 software to categorize water molecules (buried, cleft, surface).
• Employed WatCH software to identify equivalent water positions across superposed homologous SHMT structures, defining conserved clusters.

Main Results:

• Identified several conserved clusters of buried and cleft water molecules in 11 bacterial SHMTs.
• The majority of these conserved water clusters were previously undescribed.
• These findings provide a detailed map of conserved water molecules in SHMTs.

Conclusions:

• Conserved water molecules likely possess significant structural and functional roles in SHMTs.
• The identified water clusters offer insights into SHMT enzymatic mechanisms.
• This research facilitates rational design for SHMT molecular engineering and drug development.