General Information
Symbol
Dmel\Mst77F1
Species
D. melanogaster
Name
FlyBase ID
FBal0012547
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
ms(3)nc3
Allele class
Nature of the Allele
Allele class
Mutations Mapped to the Genome
 
Type
Location
Additional Notes
References
point mutation
Nucleotide change:
T20817372A
Reported nucleotide change:
T?A
Amino acid change:
S149T | Mst77F-PA
Reported amino acid change:
S149T
Associated Sequence Data
DNA sequence
Protein sequence
 
 
Progenitor genotype
Cytology
Nature of the lesion
Statement
Reference
Amino acid replacement: S149T.
Nucleotide substitution: T?A.
Expression Data
Reporter Expression
Additional Information
Statement
Reference
 
Marker for
Reflects expression of
Reporter construct used in assay
Human Disease Model Data
Disease Ontology
Models ( 0 )
Disease
Evidence
References
Interactions ( 0 )
Disease
Interaction
References
Comments ( 0 )
 
Phenotypic Data
Phenotypic Class
Phenotype Manifest In
chromatin & late spermatid
chromatin & late spermatid (with Df(3L)ri-79c)
nucleus & late spermatid
nucleus & late spermatid (with Df(3L)ri-79c)
nucleus & spermatozoon
Detailed Description
Statement
Reference
The previously reported sterility of Mst77F1/Df(3L)ri-79c males (FBrf0188104, FBrf0210142) is probably unrelated to Mst77F function (although analysis of other alleles of Mst77F establishes that this gene is required for male fertility): Df(3L)ri-79c does not uncover the Mst77F gene and does not affect its expression (shown by genomic DNA sequencing and Western blotting) and Df(3L)ri-79c fully complements the male sterility phenotype of the Mst77FΔ1 allele (a mutation within the Mst77F coding sequence that results in a frameshift and premature stop codon and whose sterility phenotype is rescued by the Mst77F+tg transgene). The Mst77F1 line does contain a S149T mutation within the Mst77F coding sequence (FBrf0188104). This lesion was identified on a chromosome originally isolated as the unmapped 'ms(3)nc3' male sterile mutation. The Mst77F1 line is probably no longer available.
Spermatid nuclei of Mst77F1/Df(3L)ri-79c males are often not aligned in parallel but are scattered within a cyst.
Mst77F1/Df(3L)ri-79c males show defective spermatid nuclei. At early stages, the spermatid nuclei appear normal but at later stages the nuclei are scattered instead of clustered and are round or ellipsoid instead of elongated. Some spermatid nuclei begin to elongate but at a far lesser rate than wild type. Chromatin condensation fails to occur properly and spermatids do not develop into individualized sperm. Mst77F1/Mst77Fc06969 males show a slightly less severe phenotype with fewer small nuclei being produced but still no sperm individualization. Mst77F1/+ males, although fertile, show a few aberrant tiny nuclei in scattered and individualized mature sperm.
Male fertility of homozygotes not determined. ms(3)nc31/+ males fertile.
External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Enhancer of
Statement
Reference
Mst77F1 is an enhancer of phenotype of βTub85Dunspecified
Additional Comments
Genetic Interactions
Statement
Reference
Df(2L)FDD-0338164 does not enhance or suppress the phenotype of abnormally formed spermatid nuclei that is seen in Mst77F1/Df(3L)ri-79c males.
Expression of Mst35BbT:Avic\GFP-EGFP fails to suppress the spermatid phenotype of Mst77F1/Df(3L)ri-79c males.
Fails to complement class I alleles at the βTub85D locus.
Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
Selected as: a mutation that fails to complement class I alleles at the βTub85D locus (either βTub85D3 or βTub85DDrv1) but does not map to the βTub85D locus.
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (4)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (5)