Identification of the mouse low-salt-eluting single-stranded DNA-binding protein as a mammalian lactate dehydrogenase-A isoenzyme.
A 36,000-Mr protein purified from mouse myeloma on the basis of selective binding to a single-stranded DNA (ssDNA)-cellulose column has been identified as the lactate dehydrogenase A (LDH-A) subunit. A homogeneous preparation of this mouse myeloma ssDNA-binding protein, termed the 'low-salt-eluting protein', was found to possess LDH activity, and rabbit antiserum prepared against this protein was shown to cross-react with purified 36,000-Mr LDH-A subunits from mouse and bovine sources. In addition, bovine and human LHD-A4 isoenzymes were shown to be capable of binding ssDNA. These enzymic and immunological identities with LDH-A were not observed with purified helix-destabilizing protein 1 from mouse myeloma. A model for ssDNA-LDH binding is discussed.
Sharief
F S
FS
Wilson
S H
SH
Li
S S
SS
D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D002417:Cattle; D004277:DNA, Single-Stranded / Q000378:metabolism*; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000378:metabolism*; D051379:Mice; D009194:Myeloma Proteins / Q000378:metabolism*
D002352:Carrier Proteins; D004277:DNA, Single-Stranded; D007527:Isoenzymes; D009194:Myeloma Proteins; D007770:L-Lactate Dehydrogenase