FB2024_03 , released June 25, 2024
Allele: Dmel\srp3
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General Information
Symbol
Dmel\srp3
Species
D. melanogaster
Name
FlyBase ID
FBal0016082
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
srp9L, srp9L06
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

N29 of the consensus sequence is replaced by a Lys within the second Cys pair of the zinc finger motif.

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

T16001847R

Amino acid change:

N825K | srp-PA; N810K | srp-PB; N307K | srp-PD; N292K | srp-PE; N307K | srp-PF; N307K | srp-PG; N342K | srp-PH

Reported amino acid change:

N511K

Comment:

Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.

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

srp3 mutant stage 13 embryos exhibit decreased efferocytosis, as shown by the decreased number of apoptotic particles per macrophage,

Mutant embryos show defects in visceral mesoderm elongation and have a strong strong germ band retraction phenotype.

srpneo45/srp3 embryos develop the majority of srp-dependent tissues normally (including the fat-body), but lack haemocytes entirely.

srp3/srpneo45 embryos lack all hemocytes yet show an entirely normal time course of wound reepithelialization.

In srp3 embryos, the salivary glands invaginate and migrate posteriorly as in wild type, but are mispositioned. Instead of being fully elongated and parallel to the body wall, srp3 glands are often curled back upon themselves. Lumenal branches are occasionally observed in these mutants.

Crystal cell marker expression is lost in srp3 homozygous embryos.

The development of the tracheal dorsal trunk appears to be normal.

Homozygous embryos show transformation of the anterior midgut to foregut and transformation of the posterior midgut to hindgut. Germ cells are internalised into the forming gut at the beginning of gastrulation. Many germ cells remain trapped in the pocket formed by the abnormal gut, while approximately 50% manage to exit the gut and are found in random positions within the embryo.

The fat body fails to form and the dorsolateral fat body is partly transformed into gonadal mesoderm.

Homozygous and srp3/srpneo45 transheterozygous embryos are devoid of any mature haemocytes. Fat body precursors are present in homozygous embryos but the cells do not proliferate and do not arrange to form the continuous sheet of cells, early events of fat body differentiation do not take place.

Germband retraction and dorsal closure fail to occur in homozygous embryos.

Mutants become distinguishable from wild type during stage 10 of embryogenesis. Cells of the prospective posterior midgut fail to lose their epithelial character and form a mesenchyme. Instead cells form a large cavity that is contiguous with the hindgut, composed of a columnar epithelium resembling the epithelium of the hindgut. No prospective anterior midgut cells, normally derived from the tip of the ventral furrow, attach to the posterior side of the stomodeum, and the anterior part of the midgut is not formed. The anterior part of the digestive tract becomes a blind-ended tube of ectodermal foregut. The endoderm fails to differentiate. The prospective anterior midgut acquires properties of the ectodermal foregut. Rudimentary Malpighian tubules develop at the correct position. In some older embryos uric acid is detectable within the lumen of the hindgut and epithelial cavity.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
NOT suppressed by
Statement
Reference
Suppressor of
Statement
Reference

srp3/srp[+] is a suppressor of lamellocyte | larval stage phenotype of ushVX22

NOT Suppressor of
Statement
Reference

srp3/srp[+] is a non-suppressor of hemocyte | larval stage phenotype of ushVX22

Other
Additional Comments
Genetic Interactions
Statement
Reference

Bfcko, srp3 double heterozygous stage 13 embryos exhibit decreased efferocytosis, as shown by the decreased number of apoptotic particles per macrophage,

Lamellocyte production is eliminated in ushVX22/+, srp3/+ double heterozygous mutant larvae, reducing numbers to wild-type levels. The number of non-lamellocyte cells is not affected.

The loss of crystal cell marker expression in srp3 homozygous embryos is not suppressed by lzScer\UAS.cBa; Scer\GAL4twi.PG.

hkb2 srp3 embryos lack the midgut and Malpighian tubules fail to be specified in the hind gut.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (2)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (5)
References (32)