FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\grk1
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General Information
Symbol
Dmel\grk1
Species
D. melanogaster
Name
FlyBase ID
FBal0005209
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
grkDC, grkDC29
Key Links
Genomic Maps

Allele class
Nature of the Allele
Allele class
Progenitor genotype
Cytology
Description

Amino acid replacement: A245V. Nucleotide substitution: C2424T.

Amino acid replacement: A245V.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Nucleotide change:

C8431693T

Reported nucleotide change:

C2424T

Amino acid change:

A246V | grk-PA

Reported amino acid change:

A245V

Variant Molecular Consequences
Associated Sequence Data
DNA sequence
Protein sequence
 
Expression Data
Reporter Expression
Additional Information
Statement
Reference
 
Marker for
Reflects expression of
Reporter construct used in assay
Human Disease Associations
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 0 )
Disease
Evidence
References
Modifiers Based on Experimental Evidence ( 0 )
Disease
Interaction
References
Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
 
Disease-implicated variant(s)
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
Detailed Description
Statement
Reference

In grk2B6/grk1 oocytes the anterior-posterior gradient of microtubule concentration seen in wild-type is abolished. However, concentration of microtubules around the mis-localized nucleus persists.

Ovaries from grk1/grk2B6 mutant females show a range of defects. In mildly affected egg chambers where the germinal vesicle has moved anterior and dorsal, border cells complete posterior migration but fail to migrate dorsally.

Microtubule cytoskeleton in grk2B6/grk1 oocytes is defective due to premature streaming of the microtubules.

grk1/grk2 heterozygous females display fused egg chambers and gaps in the follicular epithelium that uncover the nurse cells. Eggs derived from these females exhibit strong ventralised phenotype.

Reduction or absence of dorsal appendages (ventralization) with increase in main body egg shell. Micropyle at both ends of eggs, embryos ventralized.

An enlarged mass of mesodermal cells invaginates on the ventral side of the embryo, the enlarged mesoderm is often organised into two ventral furrows. Organisation is lost in later stages of development and a mass of mesodermal cells fills the ventral half of the embryo. Respiratory appendages are completely absent and only the ventral most portion of the operculum is present.

phenotype of eggs and embryos: intermediate and strong

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference
Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
Comments
Comments

Strong grk allele.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (4)
References (25)