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. 1991 Aug;96(4):1268–1276. doi: 10.1104/pp.96.4.1268

Isolation and Characterization of a Small Heat Shock Protein Gene from Maize

Paul S Dietrich 1,2, Robert A Bouchard 1,2, Elena Silva Casey 1,2, Ralph M Sinibaldi 1,2
PMCID: PMC1080925  PMID: 16668329

Abstract

A maize (Zea mays L.) genomic clone (Zmempr 9′) was isolated on the basis of its homology to a meiotically expressed Lilium sequence. Radiolabeled probe made from the maize genomic clone detected complementary RNA at high fidelity. Furthermore, it hybridized to RNA isolated from staged (an interval that is coincident with meiotic prophase) maize tassel spikelets. Complimentary RNA was strongly (at least 50-fold) induced during heat shock of maize somatic tissue and appeared as a single size class in Northern blot hybridizations. Sequencing of the complete coding region of Zmempr 9′ confirmed the homology of the inferred amino acid sequence to other small heat shock proteins. Consensus sequences found in the flanking regions corresponded to the usual signals for initiation of RNA transcription, polyadenylate addition, and the induction of heat shock genes. The latter sequences conferred heat shock-specific transient expression in electroporated protoplasts when cloned into promoterless reporter gene plasmid constructs. Hybrid-selected translations revealed specific translation products ranging from 15 to 18 kilodaltons, providing evidence that this gene is a member of a related multigene family. We therefore conclude that this maize genomic DNA clone, recovered through its homology to clones for meiotic transcripts in lily, represents a genuine maize small heat shock protein gene.

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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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