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Literature summary extracted from

  • Sumiyoshi, M.; Inamura, T.; Nakamura, A.; Aohara, T.; Ishii, T.; Satoh, S.; Iwai, H.
    UDP-arabinopyranose mutase 3 is required for pollen wall morphogenesis in rice (Oryza sativa) (2015), Plant Cell Physiol., 56, 232-241 .
    View publication on PubMed

Cloned(Commentary)

EC Number Cloned (Comment) Organism
5.4.99.30 gene UAM3 or RGP3, OsUAM3 expression is independent from OsUAM1 and OsUAM2 co-expression networks Oryza sativa Japonica Group

Protein Variants

EC Number Protein Variants Comment Organism
5.4.99.30 additional information RNA interference (RNAi)-knockdown transformants (OsUAM3-KD) specific for OsUAM3. Modifications of cell wall polysaccharides at the cellular level are determined using antibodies against polysaccharides including Araf, low levels of arabinan in OsUAM3-KD pollen grains Oryza sativa Japonica Group

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
5.4.99.30 UDP-beta-L-arabinofuranose Oryza sativa Japonica Group
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 UDP-beta-L-arabinopyranose
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 r

Organism

EC Number Organism UniProt Comment Textmining
5.4.99.30 Oryza sativa Japonica Group Q6Z4G3
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-

Source Tissue

EC Number Source Tissue Comment Organism Textmining
5.4.99.30 additional information OsUAM3 coexpression networks include pectin catabolic enzymes. Co-expression network in silico analysis, quantitative RT-PCR analysis of OsUAM isozymes gene expression in various organs at different developmental stages, overview Oryza sativa Japonica Group
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5.4.99.30 pollen OsUAM1 and OsUAM2 are expressed ubiquitously throughout plant development, but OsUAM3 is expressed primarily in reproductive tissue, particularly at the pollen cell wall formation developmental stage Oryza sativa Japonica Group
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Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
5.4.99.30 UDP-beta-L-arabinofuranose
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 Oryza sativa Japonica Group UDP-beta-L-arabinopyranose
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 r

Synonyms

EC Number Synonyms Comment Organism
5.4.99.30 OsUAM3
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 Oryza sativa Japonica Group
5.4.99.30 UDP-arabinopyranose mutase 3
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 Oryza sativa Japonica Group

General Information

EC Number General Information Comment Organism
5.4.99.30 evolution the UAM gene family has three members in Oryza sativa Oryza sativa Japonica Group
5.4.99.30 malfunction OsUAM3-knockdown plants grow normally, but show abnormal phenotypes in reproductive tissues, especially in terms of the pollen cell wall and exine. Pollen formation is abnormal in OsUAM3-KD plants, and KI-I2 staining for starch content shows that OsUAM3-KD pollen is abnormal and accumulates little starch. Low levels of arabinan in OsUAM3-KD pollen grains Oryza sativa Japonica Group
5.4.99.30 physiological function isozyme OsUAM3 has a different function from that of isozymes OsUAM1 and OsUAM2i, sozyme UDP-arabinopyranose mutase 3 is required for pollen wall morphogenesis in Oryza sativa. L-Arabinose is one of the main constituents of cell wall polysaccharides such as pectic rhamnogalacturonan I, RG-I, glucuronoarabinoxylans and other glycoproteins. It is found predominantly in the furanose form rather than in the thermodynamically more stable pyranose form. UDP-L-arabinofuranose (UDP-Araf), rather than UDP-L-arabinopyranose (UDP-Arap), is a sugar donor for the biosynthesis of arabinofuranosyl (Araf) residues. UDP-arabinopyranose mutases (UAMs) interconvert UDP-Araf and UDP-Arap and are involved in the biosynthesis of polysaccharides including Araf Oryza sativa Japonica Group