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. 1980 Jan;65(1):146–150. doi: 10.1104/pp.65.1.146

Action of Corn and Rice-inactivating Proteins on a Purified Nitrate Reductase from Chlorella vulgaris1

Tomoyuki Yamaya 2,4, Larry P Solomonson 3, Ann Oaks 2,5
PMCID: PMC440284  PMID: 16661131

Abstract

When nitrate reductase (NR) purified from Chlorella was incubated with NR-inactivating proteins purified from corn roots and rice cell suspension cultures or with trypsin there was a loss in NADH-NR and NADH cytochrome c reductase (NADH-CR) activities with time whereas the reduced methylviologen NR (MV-NR) remained active. When NADH-NR and NADH-CR activities were inactivated completely by the incubation with corn protein, the major protein band obtained by polyacrylamide gel electrophoresis shifted from an RF value of 0.12 to an RF of 0.25 and reduced MV-NR activity moved to the new position on the gel. When NADH-NR and NADH-CR activities were partially inactivated by the corn protein, NADH-NR activity was detected in an intermediate position (RF value of 0.18). Incubation with trypsin also caused a change in the NR protein migration pattern (RF value of 0.20). This protein band also had reduced MV-NR activity. Thus, the corn inactivator degrades NR in a fashion similar to but not identical with trypsin. The incubation of NR with rice inactivating protein resulted in a loss of NADH-NR but had no effect on the migration of NR protein or on the reduced MV-NR activity or mobility suggesting that the rice protein binds to Chlorella NR.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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