The gene spindle A is referred to in FlyBase by the symbol Dmel\spn-A (CG7948, FBgn0003479). It is a protein_coding_gene from Drosophila melanogaster. There is experimental evidence that it has the molecular function: protein binding. There is experimental evidence that it is involved in the biological process: germarium-derived oocyte fate determination; female meiosis; double-strand break repair via synthesis-dependent strand annealing; polarity specification of dorsal/ventral axis; intracellular mRNA localization; cell cycle checkpoint; oogenesis; polarity specification of anterior/posterior axis; karyosome formation. 31 alleles are reported. The phenotypes of these alleles are annotated with: germline cyst; chorion; egg; oocyte; presumptive oocyte; karyosome; egg chamber; dorsal appendage; nurse cell; synaptonemal complex. It has 2 annotated transcripts and 2 annotated polypeptides. Protein features are: AAA+ ATPase domain; DNA recombination and repair protein Rad51, C-terminal; DNA recombination and repair protein, RecA-like; DNA recombination/repair protein Rad51; DNA recombination/repair protein RecA, monomer-monomer interface; DNA recombination/repair protein RecA/RadB, ATP-binding domain; DNA repair Rad51/transcription factor NusA, alpha-helical; Helix-hairpin-helix DNA-binding motif, class 1. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of low expression. Peak expression observed within 00-12 hour embryonic stages, in adult female stages. Summary of FlyAtlas Anatomical Expression Data: Expression at moderate levels in the following post-embryonic organs or tissues: adult ovary. Comments on Affy2 ProbeSet: ProbeSet 1640738_a_at completely aligns to an exonic region common to each of the 2 FlyBase-annotated transcript isoforms of spn-A. Gene sequence location is 3R:25880418..25881759.
User Contributed Data
External Summaries
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
spn-A: spindle A
Maternal-effect lethal. Egg shape affected; in
extreme cases dorsal appendages are lacking and eggs have little or no dorsal-ventral polarity; some eggs have one fused
dorsal appendage. Low fecundity; eggs often slightly collapsed.
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FB2013_03
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Summary of FlyAtlas Anatomical Expression Data: Expression at moderate levels in the following post-embryonic organs or tissues: adult ovary.
[download data (TSV)]
Guide to FlyAtlas expression level colors
No expression (0 - 9.999)
Low expression (10 - 99.999)
Moderate expression (100 - 499.999)
High level expression (500 - 999.999)
Very high expression (>999.999)
Linear, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
85.35
Larval Midgut
46.8
Larval Hindgut
56.3
Larval Malpighian Tubules
77.5
Larval Fat Body
55.9
Larval Salivary Gland
45.3
Larval Trachea
73.725
Larval Carcass
44.275
Adult Head
36.7
Adult Eye
41.125
Adult Brain
40.7
Adult Thoracic-Abdominal Ganglion
52.4
Adult Crop
61.7
Adult Midgut
44.2
Adult Hindgut
46.4
Adult Malpighian Tubules
35.3
Adult Fat Body
27.5
Adult Salivary Gland
34.1
Adult Heart
32.15
Adult VirginFemale Spermatheca
32.3
Adult InseminatedFemale Spermatheca
33.4
Adult Ovary
179.9
Adult Testis
59.9
Adult Male Accessory Gland
54.4
Adult Carcass
43.8
Expression Level Scale
None
Low
Moderate
High
Very high
Heatmap
Tissue
Expression Level
Larval Central Nervous System
Larval Midgut
Larval Hindgut
Larval Malpighian Tubules
Larval Fat Body
Larval Salivary Gland
Larval Trachea
Larval Carcass
Adult Head
Adult Eye
Adult Brain
Adult Thoracic-Abdominal Ganglion
Adult Crop
Adult Midgut
Adult Hindgut
Adult Malpighian Tubules
Adult Fat Body
Adult Salivary Gland
Adult Heart
Adult VirginFemale Spermatheca
Adult InseminatedFemale Spermatheca
Adult Ovary
Adult Testis
Adult Male Accessory Gland
Adult Carcass
FlyAtlas Organ/Tissue Expression, larval vs. adult
Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of low expression. Peak expression observed within 00-12 hour embryonic stages, in adult female stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 16 )
Please Note
This section lists
cDNAs and ESTs that fall within the genomic extent
of the gene model, which may include cDNAs and ESTs
of genes within introns, or of overlapping genes.
Please see GBrowse for alignment of the cDNAs and ESTs
to the gene model.
Analysis of mutants of the 5 spindle genes (spn-A, spn-B, mus301, spn-D and spn-E) reveals that the group of genes is required for each of the symmetry-breaking steps that generate polarity during axis formation. spn-E is required for the localisation of fs(1)K10, bcd and osk mRNAs, spn-A. spn-B, mus301 and spn-D play an indirect role in this process.
Mutations in the spn-A, spn-B and spn-D genes result in a very similar phenotype to those in mus301, and in all cases the misplacement of the oocyte has the same consequences on the establishment of AP polarity in the egg chamber, as determined by the slbo expression in the follicle cells and the localization of osk and bcd mRNAs within the oocyte.
Multiple pathways suppress telomere addition to DNA breaks in the Drosophila germline. [FBrf0218640]
Ferguson et al., 2012, J. Cell Sci. 125(6): 1407--1419
Modulation of gurken translation by insulin and TOR signaling in Drosophila. [FBrf0218097]
Joyce et al., 2012, Genetics 191(3): 739--746
Multiple barriers to nonhomologous DNA end joining during meiosis in Drosophila. [FBrf0218878]
Loh et al., 2012, J. Cell Sci. 125(19): 4457--4462
The conserved kinase SRPK regulates karyosome formation and spindle microtubule assembly in Drosophila oocytes. [FBrf0220249]
Maruyama et al., 2012, Biol. Pharmaceut. Bull. 35(11): 2017--2022
RecQ5 Interacts with Rad51 and Is Involved in Resistance of Drosophila to Cisplatin Treatment. [FBrf0219869]
Zhai et al., 2012, PLoS Genet. 8(3): e1002582
Antagonistic regulation of apoptosis and differentiation by the cut transcription factor represents a tumor-suppressing mechanism in Drosophila. [FBrf0217859]
Andersen et al., 2011, PLoS Genet. 7(10): e1002315
Three Structure-Selective Endonucleases Are Essential in the Absence of BLM Helicase in Drosophila. [FBrf0216460]
Chiolo et al., 2011, Cell 144(5): 732--744
Double-Strand Breaks in Heterochromatin Move Outside of a Dynamic HP1a Domain to Complete Recombinational Repair. [FBrf0213146]
Joyce et al., 2011, J. Cell Biol. 195(3): 359--367
Drosophila ATM and ATR have distinct activities in the regulation of meiotic DNA damage and repair. [FBrf0216489]
Reis et al., 2011, PLoS ONE 6(3): e17512
Drosophila Genes That Affect Meiosis Duration Are among the Meiosis Related Genes That Are More Often Found Duplicated. [FBrf0213266]
Toku et al., 2011, Comput. Biol. Chem. 35(5): 282--292
Reconstruction and crosstalk of protein-protein interaction networks of Wnt and Hedgehog signaling in Drosophila melanogaster. [FBrf0216393]