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Literature summary for 2.7.13.3 extracted from

  • Yuan, L.; Liu, Z.; Song, X.; Johnson, C.; Yu, X.; Sundaresan, V.
    The CKI1 histidine kinase specifies the female gametic precursor of the endosperm (2016), Dev. Cell, 37, 34-46.
    View publication on PubMed
Search for more literature for 2.7.13.3

Cloned(Commentary)

Cloned (Comment) Organism
ectopic CKI1 expression in all nuclei of the female gametophyte, under the pAKV promoter using the pOp/LhG4 transactivation system, generates non-propagating seeds with dual fertilized endosperms and no embryos, phenotypes, detailed overview Arabidopsis thaliana

Protein Variants

Protein Variants Comment Organism
additional information generation of CKI1 loss-of-function mutants. Transformation of egg cell to central cell by ectopic CKI1 retains female gametophyte organization Arabidopsis thaliana

Localization

Localization Comment Organism GeneOntology No. Textmining
endoplasmic reticulum
-
 Arabidopsis thaliana 5783
-

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana
-
-
-
Arabidopsis thaliana Col-0
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
embryonic syncytium
-
 Arabidopsis thaliana
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endosperm
-
 Arabidopsis thaliana
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female gametophyte
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 Arabidopsis thaliana
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additional information spatial distribution of endoplasmic reticulum-localized CKI1 in the syncytial embryo sac is mediated by nuclear position and migration, overview Arabidopsis thaliana
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seed
-
 Arabidopsis thaliana
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Synonyms

Synonyms Comment Organism
AHK
-
 Arabidopsis thaliana
Arabidopsis histidine kinase
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 Arabidopsis thaliana
CKI1 histidine kinase
-
 Arabidopsis thaliana
cytokinin independent I histidine kinase
-
 Arabidopsis thaliana

General Information

General Information Comment Organism
malfunction ectopic CKI1 expression generates non-propagating seeds with dual fertilized endosperms and no embryos. CKI1 loss-of-function mutants exhibit gametophytic defects resulting in semi-sterility. Cell specification is defective in cki1 mutant embryo sacs. Autonomous endosperms arise from ectopic central cells in the PRC2 fis2 (fertilization independent 2) mutant Arabidopsis thaliana
physiological function Arabidopsis thaliana endosperm formation requires the cytokinin independent 1 (CKI1) histidine kinase, an activator of the cytokinin signaling pathway, which specifies central cells and restricts egg cell fate. Seeds of flowering plants contain embryos and nutritive endosperm arising from double fertilization of two dimorphic female gametes. The key to specification of only one female gamete for endosperm formation is the regulated localization of the CKI1 histidine kinase by expression control and protein translocation. Dimorphism of the two adjacent gametes is mechanistically established in the syncytial embryo sac by spatially restricted CKI1 expression, followed by translocation of endoplasmic reticulum-localized CKI1 protein via nuclear migration. CKI1-directed specification of the endosperm precursor central cell results in seeds containing an embryo and an endosperm, mechanism, overview Arabidopsis thaliana