The gene Ran GTPase activating protein is referred to in FlyBase by the symbol Dmel\RanGAP (CG9999, FBgn0003346). It is a protein_coding_gene from Drosophila melanogaster. There is experimental evidence that it has the molecular function: Ran GTPase activator activity. There is experimental evidence that it is involved in the biological process: neurogenesis. 31 alleles are reported. The phenotypes of these alleles are annotated with: spermatid; mesothoracic tergum. It has 3 annotated transcripts and 3 annotated polypeptides. Protein features are: Ran GTPase-activating protein. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of very high expression to a trough of moderate expression. Peak expression observed within 00-06 hour embryonic stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: larval central nervous system, adult ovary. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult hindgut, larval fat body, larval salivary gland, larval trachea, adult male reproductive system, larval carcass. Comments on Affy2 ProbeSet: ProbeSet 1623819_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of RanGap. Gene sequence location is 2L:19441959..19447317.
User Contributed Data
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
Sd: Segregation distorter
Sd-bearing second chromosomes are referred to as SD;
they carry, in addition to Sd, other components of the segregation distortion system; they may carry inversions and recessive lethal alleles as well. The constitutions of various SD
chromosomes are tabulated below. Other components of the
segregation distortion system are E(SD) (Enhancer of SD) at
the base of 2L; and Rsp (Responder) at the base of 2R;
St(SD) (Stabilizer of SD) located more distally in 2R appears
to comprise several weak enhancers of distortion (Miklos,
1972, Genetics 70: 405-18). All naturally occurring SD chromosomes carry Sd and E(SD) but lack Rsp [sometimes said to
carry Rspi (Responder insensitive)]; most normal chromosomes
carry a Rsp element. SD/+ males transmit SD-bearing, to the
virtual exclusion of +-bearing, homologues; as many as 99% of
the functional sperm may carry SD (defined as k = .99). The
sex ratio of the minority class of offspring, in diverse
crosses, is skewed in proportion to k in such a way as to
indicate that within this class the probability of recovery of
XY- < X - < Y -bearing <nullo-X, nullo-Y sperm (Denell, Judd,
and Richardson, 1969, Genetics 61: 129-39; Denell and Miklos,
1971, Mol. Gen. Genet. 110: 167-77). Distortion by Sd
requires heterozygosity at the Rsp locus; when Rsp is on the
homologue, the Sd-bearing chromosome is preferentially
recovered. and when Rsp and Sd are in coupling, the homologue
is recovered preferentially. Extensive electron microscopic studies of spermatogenesis
(Tokuyasu, Peacock, and Hardy, 1972, Z. Zellforsch.
124: 479-506; 127: 492-525; 1977, J. Ultrastruct. Res.
48: 284-303) demonstrate that spermiogenesis of SD/+ males is
defective; chromatin in half of the spermatid nuclei fails to
condense properly, leading in some cases to a failure of the
spermatids to become individually invested in membrane,
remaining syncytial instead, and in all cases to incomplete
maturation of half the sperm. In addition, the transition
from lysine-rich to sperm-specific arginine-rich histone,
which normally occurs in late spermiogenesis, does not appear
to take place in half the spermatids of SD/+ males
(Hauschteck-Jungen and Hartl, 1978, Genetics 101: 57-69).
Temperature-sensitive period of distortion said to be in the
primary spermatocyte (Mange, 1968, Genetics 58: 399-413);
however, see Matthews and Mortin (1983, Canad. J. Genet.
Cytol. 25: 662-67). k values also reported to increase with
time of storage of sperm by females (Hartl, 1973, Genetics
74: 619-31), to decrease with the age of SD/+ males
(Hiraizumi and Watanabe, 1969, Genetics 63: 212-31), and to
be influenced by the genotype of the female to which such
males are crossed (Denell and Judd, 1969, Mol. Gen. Genet.
105: 262-74). Segregation distortion is subject to modification by numerous genetic factors throughout the genome; in
addition various abnormal chromosome constitutions have been
reported to reduce k values (Novitski and Erlich, 1970, DIS
45: 102; Enns, 1970, DIS 45: 136; Fowler, 1971, DIS 46: 74).
Homozygous (when viable) and heteroallelic constitutions exhibit variably reduced male fertility, but the contribution of
Sd vis a vis other components of the SD chromosomes involved
not easily ascertainable. SD chromosomes without effect in
females.
Recent Updates
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Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: larval central nervous system, adult ovary. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult hindgut, larval fat body, larval salivary gland, larval trachea, adult male reproductive system, larval carcass.
[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
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
(777.4)
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
(560.2)
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
777.4
Larval Midgut
71.3
Larval Hindgut
117.7
Larval Malpighian Tubules
74.3
Larval Fat Body
110.9
Larval Salivary Gland
213.6
Larval Trachea
309.475
Larval Carcass
163.625
Adult Head
63.3
Adult Eye
64.9
Adult Brain
52.2
Adult Thoracic-Abdominal Ganglion
84.1
Adult Crop
78.9
Adult Midgut
73.8
Adult Hindgut
113.8
Adult Malpighian Tubules
60
Adult Fat Body
73.5
Adult Salivary Gland
43.2
Adult Heart
58.45
Adult VirginFemale Spermatheca
79.3
Adult InseminatedFemale Spermatheca
94.1
Adult Ovary
560.2
Adult Testis
222.2
Adult Male Accessory Gland
118.3
Adult Carcass
60.7
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 very high expression to a trough of moderate expression. Peak expression observed within 00-06 hour embryonic stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 59 )
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.
The truncated RanGap product encoded by SD distorting chromosomes (RanGapSD) retains normal enzyme activity, but has abnormal subcellular location, being distributed diffusely throughout the cytoplasm and also having a distinct nuclear component in primary spermatocytes and salivary gland cells. Mislocalisation of the active RanGapSD product to the nucleus is responsible for segregation distortion (distortion is abolished if enzymatic activity or nuclear localisation of the RanGapSD product is perturbed).
SD chromosomes have a tandem duplication at the RanGap locus. Distortion is caused by a truncated RanGap product encoded by the distal half of the duplication.
A mutation of RanGap generated by loss of a P-element in RanGap exhibits a maternal effect embryonic lethal phenotype. Homozygous females are completely normal but hemizygotes are sterile regardless of the genotype of the male. Embryos from these females die before the syncytial blastoderm stage, around the 7th or 8th nuclear division. In addition, their nuclei are no longer mitotically synchronous and many appear abnormal in size and shape.
Fukuyama et al., 2012, J. Proteomics 75(15): 4610--4619
On-bead tryptic proteolysis: An attractive procedure for LC-MS/MS analysis of the Drosophila caspase 8 protein complex during immune response against bacteria. [FBrf0218992]
Reid et al., 2012, Front. Cell. Infect. Microbiol. 2: 24
Identification of genetic modifiers of CagA-induced epithelial disruption in Drosophila. [FBrf0219288]
Steiner et al., 2012, Genome Res. 22(4): 766--777
Cell-type-specific nuclei purification from whole animals for genome-wide expression and chromatin profiling. [FBrf0217906]
Cesario and McKim, 2011, J. Cell Sci. 124(22): 3797--3810
RanGTP is required for meiotic spindle organization and the initiation of embryonic development in Drosophila. [FBrf0216751]
Liu et al., 2011, Dev. Growth Differ. 53(6): 822--841
Negative modulation of bone morphogenetic protein signaling by Dullard during wing vein formation in Drosophila. [FBrf0214664]
Neumüller et al., 2011, Cell Stem Cell 8(5): 580--593
Genome-Wide Analysis of Self-Renewal in Drosophila Neural Stem Cells by Transgenic RNAi. [FBrf0213621]
Schrider et al., 2011, Genome Res. 21(12): 2087--2095
Genome-wide analysis of retrogene polymorphisms in Drosophila melanogaster. [FBrf0216827]