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Pex1, a pollen-specific gene with an extensin-like domain.


ABSTRACT: We report here the identification of a pollen-specific gene from Zea mays that contains multiple Ser-(Pro)n repeats, the motif found in the cell wall-associated extensins. Sequence analysis reveals that the encoded protein has a putative globular domain at the N terminus and an extensin-like domain at the C terminus. The Pex1 (pollen extensin-like) gene is expressed exclusively in pollen, not in vegetative or female tissues, and is not induced in leaves upon wounding. We propose that the encoded protein may have a role in reproduction, either as a structural element deposited in the pollen tube wall during its rapid growth or as a sexual recognition molecule that interacts with partner molecules in the pistil.

SUBMITTER: Rubinstein AL 

PROVIDER: S-EPMC42109 | biostudies-other | 1995 Apr

REPOSITORIES: biostudies-other

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Pex1, a pollen-specific gene with an extensin-like domain.

Rubinstein A L AL   Broadwater A H AH   Lowrey K B KB   Bedinger P A PA  

Proceedings of the National Academy of Sciences of the United States of America 19950401 8


We report here the identification of a pollen-specific gene from Zea mays that contains multiple Ser-(Pro)n repeats, the motif found in the cell wall-associated extensins. Sequence analysis reveals that the encoded protein has a putative globular domain at the N terminus and an extensin-like domain at the C terminus. The Pex1 (pollen extensin-like) gene is expressed exclusively in pollen, not in vegetative or female tissues, and is not induced in leaves upon wounding. We propose that the encoded  ...[more]

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