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GrainGenes Reference Report: PMB-53-213

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Reference	PMB-53-213
Title	Biochemical evidence linking a putative callose synthase gene with (1 -> 3)-beta-D-glucan biosynthesis in barley
Journal	Plant Molecular Biology
Year	2003
Volume	53
Pages	213-225
Author	Li J [ Show all 7 ]
Abstract	Summary: A putative barley (1 to 3)-(beta)-D-glucan synthase cDNA of 6.1 kb, which is homologous to the yeast FKS gene, was assembled from DNA fragments obtained through screening of barley cDNA and BAC libraries, and by PCR amplification. The corresponding gene, designated HvGSL1, is a member of a family of at least six genes in barley. Gene transcripts are detected at relatively high levels in early developing grain, florets, coleoptiles and roots, but not in leaves infected with a fungal pathogen. A (1 to 3)-(beta)-D-glucan synthase has been purified more than 60-fold from barley suspension-cultured cells by detergent extraction, CaCl2 treatment, sucrose density gradient centrifugation and non-denaturing gel electrophoresis. The enzyme synthesizes (1 to 3)-(beta)-D-glucan in vitro and is recognized by antibodies raised against a 17 kDa protein generated by heterologous expression of a fragment of the HvGSL1 cDNA. Furthermore, mass spectrometric analyses show that tryptic peptides produced by in-gel digestion of the active enzyme match peptides predicted from the gene sequence. Thus, the amino acid sequence predicted from the HvGSL1 gene has been linked with the actual amino acid sequence of an active (1 to 3)-(beta)-D-glucan synthase fraction from barley
Keyword	[ Hide all but 1 of 44 ] 1,3-beta-d-glucan synthase active enzyme active site amino amino acid sequence amplification antibody bac library barley bean phaseolus-vulgaris beta-glucan synthesis biosynthesis cdna cell cell wall cellulose synthase density dna electrophoresis enzyme extraction family florets fragments gene gene expression genetic mapping gsl heterologous expression hordeum vulgare lolium multiflorum endosperm pathogen pcr pcr amplification pollen tubes protein purification sequence sequence analysis sucrose suspension-cultured cell synthase transcript yeast

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