| Primary structural features of rosaceous S-RNases associated with gametophytic self-incompatibility. | |
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MedLine Citation:
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PMID: 9700066 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We isolated cDNA clones encoding five S-RNases (S1-, S3-, S5-, S6-, S7-RNases) from pistils of Pyrus pyrifolia (Japanese pear), a member of the Rosaceae. Their amino acid sequences were aligned with those of other rosaceous S-RNases sequenced so far. A total of 76 conserved amino acid residues were stretched throughout the sequence, but were absent from the 51-66 region which was designated the hypervariable (HV) region. The phylogenetic tree of rosaceous S-RNases showed that S-RNase polymorphism predated the divergence of Pyrus and Malus. Pairwise comparison of these S-RNases detected two highly homologous pairs, P. pyrifolia S1- and S4-RNases (90.0%) and P. pyrifolia S3- and S5-RNases (95.5%). The positions of amino acid substitutions between S1- and S4-RNases were spread over the entire region, but in the pair of S3- and S5-RNases, amino acid substitutions were found in the 21-90 region including the HV region. The substitutions in this restricted region appear to be sufficient to discriminate between S3 and S5 pollen and to trigger the self-incompatible reaction. |
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Authors:
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T Ishimizu; T Shinkawa; F Sakiyama; S Norioka |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Plant molecular biology Volume: 37 ISSN: 0167-4412 ISO Abbreviation: Plant Mol. Biol. Publication Date: 1998 Aug |
Date Detail:
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Created Date: 1998-08-28 Completed Date: 1998-08-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9106343 Medline TA: Plant Mol Biol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 931-41 Citation Subset: IM |
Affiliation:
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Division of Protein Chemistry, Institute for Protein Research, Osaka University, Suita, Japan. |
| Data Bank Information | |
Bank Name/Acc. No.:
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GENBANK/AB002139; AB002140; AB002141; AB002142; AB002143 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Alleles Amino Acid Sequence Base Sequence Cloning, Molecular Crosses, Genetic DNA, Complementary / genetics Evolution, Molecular Fertility / genetics Fruit / enzymology, genetics* Haploidy Molecular Sequence Data Ribonucleases / genetics* Rosales / enzymology, genetics* Sequence Analysis, DNA Sequence Homology, Amino Acid Sequence Homology, Nucleic Acid Species Specificity |
| Chemical | |
Reg. No./Substance:
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0/DNA, Complementary; EC 3.1.-/Ribonucleases; EC 3.1.4.-/ribonuclease S |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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