PMID- 12481045 OWN - NLM STAT- MEDLINE DCOM- 20030530 LR - 20181113 IS - 0032-0889 (Print) IS - 1532-2548 (Electronic) IS - 0032-0889 (Linking) VI - 130 IP - 4 DP - 2002 Dec TI - Targeted analysis of orthologous phytochrome A regions of the sorghum, maize, and rice genomes using comparative gene-island sequencing. PG - 1614-25 AB - A "gene-island" sequencing strategy has been developed that expedites the targeted acquisition of orthologous gene sequences from related species for comparative genome analysis. A 152-kb bacterial artificial chromosome (BAC) clone from sorghum (Sorghum bicolor) encoding phytochrome A (PHYA) was fully sequenced, revealing 16 open reading frames with a gene density similar to many regions of the rice (Oryza sativa) genome. The sequences of genes in the orthologous region of the maize (Zea mays) and rice genomes were obtained using the gene-island sequencing method. BAC clones containing the orthologous maize and rice PHYA genes were identified, sheared, subcloned, and probed with the sorghum PHYA-containing BAC DNA. Sequence analysis revealed that approximately 75% of the cross-hybridizing subclones contained sequences orthologous to those within the sorghum PHYA BAC and less than 25% contained repetitive and/or BAC vector DNA sequences. The complete sequence of four genes, including up to 1 kb of their promoter regions, was identified in the maize PHYA BAC. Nine orthologous gene sequences were identified in the rice PHYA BAC. Sequence comparison of the orthologous sorghum and maize genes aided in the identification of exons and conserved regulatory sequences flanking each open reading frame. Within genomic regions where micro-colinearity of genes is absolutely conserved, gene-island sequencing is a particularly useful tool for comparative analysis of genomes between related species. FAU - Morishige, Daryl T AU - Morishige DT AD - Institute for Plant Genomics and Biotechnology and Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, USA. FAU - Childs, Kevin L AU - Childs KL FAU - Moore, L David AU - Moore LD FAU - Mullet, John E AU - Mullet JE LA - eng SI - GENBANK/AF369906 PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Plant Physiol JT - Plant physiology JID - 0401224 RN - 0 (DNA, Plant) RN - 0 (Phytochrome A) RN - 11121-56-5 (Phytochrome) SB - IM MH - Base Sequence MH - Chromosomes, Artificial, Bacterial/genetics MH - Conserved Sequence/genetics MH - DNA, Plant/chemistry/genetics MH - *Genome, Plant MH - Molecular Sequence Data MH - Oryza/genetics MH - Phytochrome/*genetics MH - Phytochrome A MH - Poaceae/*genetics MH - Promoter Regions, Genetic/genetics MH - Sequence Alignment MH - Sequence Analysis, DNA MH - Sequence Homology, Nucleic Acid MH - Species Specificity MH - Zea mays/genetics PMC - PMC166677 EDAT- 2002/12/14 04:00 MHDA- 2003/05/31 05:00 PMCR- 2003/12/01 CRDT- 2002/12/14 04:00 PHST- 2002/12/14 04:00 [pubmed] PHST- 2003/05/31 05:00 [medline] PHST- 2002/12/14 04:00 [entrez] PHST- 2003/12/01 00:00 [pmc-release] AID - 7589 [pii] AID - 10.1104/pp.012567 [doi] PST - ppublish SO - Plant Physiol. 2002 Dec;130(4):1614-25. doi: 10.1104/pp.012567.