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Relevance to Autism

Three de novo variants in the GIGYF2 gene (1 nonsense, 2 missense) have been identified in simplex ASD cases, with no de novo events in this gene observed in 1,786 unaffected siblings from the Simons Simplex Collection (P=3.40 x 10-4) (De Rubeis et al., 2014; Iossifov et al., 2014; Krumm et al., 2015).

Molecular Function

This gene contains CAG trinucleotide repeats and encodes a protein containing several stretches of polyglutamine residues. The encoded protein may be involved in the regulation of tyrosine kinase receptor signaling. This gene is located in a chromosomal region that was genetically linked to Parkinson disease type 11, and mutations in this gene were thought to be causative for this disease.

External Links

        

References

Type
Title
Type of Disorder
Associated Disorders
Author, Year
Primary
Synaptic, transcriptional and chromatin genes disrupted in autism.
ASD
Support
Rates, distribution and implications of postzygotic mosaic mutations in autism spectrum disorder.
ASD
Support
Association of rare missense variants in the second intracellular loop of NaV1.7 sodium channels with familial autism.
ASD
Support
De novo genic mutations among a Chinese autism spectrum disorder cohort.
ASD
Support
Excess of rare, inherited truncating mutations in autism.
ASD
Support
The contribution of de novo coding mutations to autism spectrum disorder
ASD
Support
Integrating de novo and inherited variants in 42
ASD
Support
Large-scale targeted sequencing identifies risk genes for neurodevelopmental disorders
ASD, DD
Recent Recommendation
Low load for disruptive mutations in autism genes and their biased transmission.
ASD

Rare

Variant ID
Variant Type
Allele Change
Residue Change
Inheritance Pattern
Inheritance Association
Family Type
Author, Year
 GEN721R001 
 missense_variant 
 c.2930G>A 
 p.Arg977Gln 
 De novo 
  
 Simplex 
 GEN721R002 
 missense_variant 
 c.3527C>G 
 p.Pro1176Arg 
 De novo 
  
 Simplex 
 GEN721R003 
 stop_gained 
 c.1990C>T 
 p.Gln664Ter 
 De novo 
  
 Simplex 
 GEN721R004 
 stop_gained 
 c.958G>T 
 p.Gly320Cys 
 De novo 
  
  
 GEN721R005 
 inframe_deletion 
 c.3042_3053del 
 p.Lys1015_Gln1018del 
 Unknown 
 Not maternal 
  
 GEN721R006 
 missense_variant 
 c.2867G>A 
 p.Arg956Gln 
 Unknown 
 Not maternal 
  
 GEN721R007 
 missense_variant 
 c.3669G>C 
 p.Gln1223His 
 Familial 
  
 Extended multiplex 
 GEN721R008 
 stop_gained 
 c.2416C>T 
 p.Arg806Ter 
 De novo 
  
 Multiplex 
 GEN721R009 
 stop_gained 
 c.817C>T 
 p.Arg273Ter 
 Unknown 
  
  
 GEN721R010 
 missense_variant 
 c.1592A>G 
 p.Glu531Gly 
 De novo 
  
  
 GEN721R011 
 missense_variant 
 c.149C>T 
 p.Ala50Val 
 Familial 
 Maternal 
  
 GEN721R012 
 missense_variant 
 c.149C>T 
 p.Ala50Val 
 Familial 
 Maternal 
 Simplex 
 GEN721R013 
 missense_variant 
 c.2116G>A 
 p.Val706Met 
 Familial 
 Maternal 
  
 GEN721R014 
 missense_variant 
 c.2116G>A 
 p.Val706Met 
 Familial 
 Paternal 
  
 GEN721R015 
 missense_variant 
 c.1450C>T 
 p.Arg484Trp 
 Unknown 
  
  
 GEN721R016 
 missense_variant 
 c.493G>T 
 p.Gly165Cys 
 Unknown 
  
  
 GEN721R017 
 missense_variant 
 c.971C>T 
 p.Ser324Leu 
 Unknown 
  
  
 GEN721R018 
 missense_variant 
 c.821G>A 
 p.Arg274His 
 Unknown 
  
  
 GEN721R019 
 missense_variant 
 c.689G>T 
 p.Arg230Ile 
 Unknown 
  
  
 GEN721R020 
 missense_variant 
 c.2935C>T 
 p.Arg979Trp 
 Unknown 
  
  
 GEN721R021 
 missense_variant 
 c.502C>T 
 p.Arg168Cys 
 Unknown 
  
  
 GEN721R022 
 missense_variant 
 c.1637C>T 
 p.Ser546Leu 
 Unknown 
  
  
 GEN721R023 
 missense_variant 
 c.101C>T 
 p.Pro34Leu 
 Unknown 
  
  
 GEN721R024 
 missense_variant 
 c.2071A>G 
 p.Ile691Val 
 De novo 
  
  
 GEN721R025 
 synonymous_variant 
 c.2211A>G 
 p.Leu737%3D 
 De novo 
  
  
 GEN721R026 
 missense_variant 
 c.2828C>T 
 p.Thr943Met 
 De novo 
  
  

Common

No Common Variants Available
Chromosome
CNV Locus
CNV Type
# of studies
Animal Model
2
Duplication
 1
 
2
Duplication
 1
 
2
Duplication
 1
 
2
Deletion
 1
 
2
Deletion-Duplication
 2
 
2
Deletion-Duplication
 20
 
2
Deletion
 10
 

Model Summary

Gyf-VDRC105985 mutants showed a habituation deficit, whereas Gyf-VDRC18159 mutants' initial jump response was impaired.

References

Type
Title
Author, Year
Primary
Targeted sequencing identifies 91 neurodevelopmental-disorder risk genes with autism and developmental-disability biases.

F_GYF_1_KD_GAL4:UAS;RNAI-VDRC105985

Model Type: Genetic
Model Genotype: Wild type
Mutation: Gyf-Gal4 driver line expressing UAS-Gfy-RNAi.
Allele Type: Loss-of-function
Strain of Origin: Not reported
Genetic Background: Not reported
ES Cell Line:
Mutant ES Cell Line:
Model Source:

F_GYF_2_KD_GAL4:UAS;RNAI-VDRC18159

Model Type: Genetic
Model Genotype: Wild type
Mutation: Gyf-Gal4 driver line expressing UAS-Gfy-RNAi.
Allele Type: Loss-of-function
Strain of Origin: Not reported
Genetic Background: Not reported
ES Cell Line:
Mutant ES Cell Line:
Model Source:

F_GYF_1_KD_GAL4:UAS;RNAI-VDRC105985

Category
Entity
Quantity
Experimental Paradigm
Age at Testing
Habituation to aversive stimuli1
Decreased
Description: When challenged in the light-off jump paradigm, the mutants showed a habituation deficit compared to controls.
Exp Paradigm: Habituation was measured in number of trials to reach no-jump criterion.
 Light-off startle jump
 adult stage
Startle response1
 No change
 Light-off startle jump
 adult stage
 Not Reported: Circadian sleep/wake cycle, Communications, Developmental profile, Immune response, Learning & memory, Maternal behavior, Molecular profile, Motor phenotype, Neuroanatomy / ultrastructure / cytoarchitecture, Neurophysiology, Physiological parameters, Repetitive behavior, Seizure, Sensory, Social behavior

F_GYF_2_KD_GAL4:UAS;RNAI-VDRC18159

Category
Entity
Quantity
Experimental Paradigm
Age at Testing
Startle response1
Decreased
Description: When challenged in the light-off jump paradigm, the mutants' initial jump response was impaired (19% frequency of initial jumping), thus precluding proper assessment of habituation.
 Light-off startle jump
 adult stage
 Not Reported: Circadian sleep/wake cycle, Communications, Developmental profile, Emotion, Immune response, Learning & memory, Maternal behavior, Molecular profile, Motor phenotype, Neuroanatomy / ultrastructure / cytoarchitecture, Neurophysiology, Physiological parameters, Repetitive behavior, Seizure, Sensory, Social behavior

 

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