Any feedback?
Please rate this page
(literature.php)
(0/150)

BRENDA support

Literature summary for 2.7.12.2 extracted from

  • Duan, P.; Rao, Y.; Zeng, D.; Yang, Y.; Xu, R.; Zhang, B.; Dong, G.; Qian, Q.; Li, Y.
    SMALL GRAIN 1, which encodes a mitogen-activated protein kinase kinase 4, influences grain size in rice (2014), Plant J., 77, 547-557.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
gene SMG1 encoding a MKK4 (OsMKK4), recombinant enzyme expression of wild-type and smg1-1 and smg1-2 mutants in leaves of Nicotiana benthamiana via transfection with Agrobacterium tumefaciens strain EHA105 Oryza sativa Japonica Group

Protein Variants

Protein Variants Comment Organism
additional information the small grain1, smg1, mutant is isolated from the japonica variety SF43 irradiated with gamma-rirradiation, and the natural mutant smg1-2 is identified from the japonica variety Nipponbare. Identification of the mutations using a map-based cloning approach, in mitogen-activated protein kinase kinase 4, OsMKK4. The mutants exhibit small and light grains, dense and erect panicles and comparatively slightly shorter plants. The short grain and panicle phenotypes of smg1 mutants are caused by a defect in cell proliferation. Mutant phenotype, overview Oryza sativa Japonica Group

Localization

Localization Comment Organism GeneOntology No. Textmining
cytoplasm
-
Oryza sativa Japonica Group 5737
-
nucleus
-
Oryza sativa Japonica Group 5634
-

Organism

Organism UniProt Comment Textmining
Oryza sativa Japonica Group Q0DWY3 cvs. SF43 and Nipponbare
-

Source Tissue

Source Tissue Comment Organism Textmining
epidermal cell
-
Oryza sativa Japonica Group
-
leaf
-
Oryza sativa Japonica Group
-
additional information the enzyme is ubiquitously distributed in the plant. Relatively higher expression of OsMKK4/SMG1 is detected in younger organs than in older ones Oryza sativa Japonica Group
-
panicle
-
Oryza sativa Japonica Group
-
seedling
-
Oryza sativa Japonica Group
-

Synonyms

Synonyms Comment Organism
mitogen-activated protein kinase kinase 4
-
Oryza sativa Japonica Group
OsMKK4
-
Oryza sativa Japonica Group
SMG1
-
Oryza sativa Japonica Group

General Information

General Information Comment Organism
malfunction small grain 1, smg1, mutants exhibit small and light grains, dense and erect panicles and comparatively slightly shorter plants. The short grain and panicle phenotypes of smg1 mutants are caused by a defect in cell proliferation. Mutant smg1 forms dense and erect panicles. Mutant phenotype, overview Oryza sativa Japonica Group
physiological function gene SMG1 encodes enzyme MKK4 (OsMKK4), which influences grain size by promoting cell proliferation, SMG1 influences panicle size and shape. OsMKK4 influences brassinosteroid (BR) responses and the expression of BR-related genes. Enzyme OsMKK4 is a factor for grain size, and links the MAPK pathways and brassinosteroids in grain growth Oryza sativa Japonica Group