Enzymes
| UniProtKB help_outline | 1 proteins |
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- Name help_outline zeatin Identifier CHEBI:15333 (Beilstein: 1217241) help_outline Charge 0 Formula C10H13N5O InChIKeyhelp_outline UZKQTCBAMSWPJD-UHFFFAOYSA-N SMILEShelp_outline [H]C(CNc1ncnc2[nH]cnc12)=C(C)CO 2D coordinates Mol file for the small molecule Search links Involved in 6 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP-α-D-xylose Identifier CHEBI:57632 Charge -2 Formula C14H20N2O16P2 InChIKeyhelp_outline DQQDLYVHOTZLOR-OCIMBMBZSA-L SMILEShelp_outline O[C@@H]1CO[C@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2ccc(=O)[nH]c2=O)[C@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 25 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline O-β-D-xylosylzeatin Identifier CHEBI:17438 Charge 0 Formula C15H21N5O5 InChIKeyhelp_outline BTXBYCHDVZGXMF-IEDJDMPFSA-N SMILEShelp_outline C\C(CO[C@@H]1OC[C@@H](O)[C@H](O)[C@H]1O)=C\CNc1ncnc2[nH]cnc12 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP Identifier CHEBI:58223 Charge -3 Formula C9H11N2O12P2 InChIKeyhelp_outline XCCTYIAWTASOJW-XVFCMESISA-K SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])(=O)OP([O-])([O-])=O)O[C@H]([C@@H]1O)n1ccc(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 577 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:14721 | RHEA:14722 | RHEA:14723 | RHEA:14724 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Isolation and partial purification of an enzyme catalyzing the formation of O-xylosylzeatin in Phaseolus vulgaris embryos.
Turner J.E., Mok D.W., Mok M.C., Shaw G.
An enzyme catalyzing the formation of a cytokinin metabolite, an O-pentosyl derivative of zeatin [Lee, Y. H., Mok, M. C., Mok, D. W. S., Griffin, D. A. & Shaw, G. (1985) Plant Physiol. 77, 635-641], was isolated from Phaseolus vulgaris embryos. Of all the potential pentose donors tested, UDP-xylos ... >> More
An enzyme catalyzing the formation of a cytokinin metabolite, an O-pentosyl derivative of zeatin [Lee, Y. H., Mok, M. C., Mok, D. W. S., Griffin, D. A. & Shaw, G. (1985) Plant Physiol. 77, 635-641], was isolated from Phaseolus vulgaris embryos. Of all the potential pentose donors tested, UDP-xylose was the only substrate recognized by the enzyme. This indicates that the O-pentosyl derivatives previously obtained are O-xylosylzeatin and its ribonucleoside. The enzyme (UDP-xylose:zeatin O-xylosyltransferase, EC 2.4.2.-) has high affinity for trans-zeatin (K(m) 2 muM) and dihydrozeatin (K(m) 10 muM) but does not recognize cis-zeatin or ribosylzeatin. The molecular weight of the enzyme is approximately 50,000 and the pH optimum of the reaction is 8-8.5. Under comparable isolation and reaction conditions, similar enzyme activity could not be detected in P. lunatus embryos, confirming the genetic differences observed in vivo. << Less
Proc Natl Acad Sci U S A 84:3714-3717(1987) [PubMed] [EuropePMC]
Comments
Published in: Substrate specificity and domain analyses of zeatin O-glycosyltransferases Martin, R.C.; Cloud, K.A.; Mok, M.C.; Mok, D.W.S.; Plant Growth Regul. 32, 289-293 (2000)