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Expression, purification, and crystallization of meso-diaminopimelate dehydrogenase from Corynebacterium glutamicum

S G Reddy1, G Scapin, J S Blanchard

  • 1Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.

Proteins
|August 1, 1996
PubMed

Insights

Crystallization of meso-diaminopimelate dehydrogenase (DAPDH) from Corynebacterium glutamicum in complex with NADP+ was achieved. This structural study provides insights into the enzyme

Area of Science:

  • Biochemistry
  • Structural Biology
  • Crystallography

Background:

  • Meso-diaminopimelate dehydrogenase (DAPDH) is a key enzyme in the biosynthesis of lysine in certain bacteria.
  • Understanding the structure of DAPDH is crucial for developing potential antimicrobial agents targeting this pathway.

Purpose of the Study:

  • To obtain high-quality crystals of the DAPDH-NADP+ complex for structural determination.
  • To characterize the crystallographic properties of the DAPDH-NADP+ complex.

Main Methods:

  • Over-expression and purification of Corynebacterium glutamicum DAPDH.
  • Crystallization screening using polyethylene glycol 8000 and magnesium acetate.
  • X-ray diffraction analysis of the obtained crystals.

Main Results:

  • Homogeneous DAPDH enzyme was successfully purified.
  • Crystals of the binary DAPDH-NADP+ complex were obtained.
  • The crystals belong to the orthorhombic space group P2(1) and diffract to 2.2 Å resolution.

Conclusions:

  • The successful crystallization of the DAPDH-NADP+ complex paves the way for detailed structural analysis.
  • This structural information can aid in understanding enzyme mechanism and inhibitor design.

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