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Relevance to Autism

A rare missense variant in the RLIM gene (c.1067A>G; p.Tyr356Cys) segregated with disease in a three-generation Norwegian family with a novel X-linked intellectual disability syndrome characterized by autism, subtle facial dysmorphism, and severe feeding problems (Tonne et al., 2015).

Molecular Function

The protein encoded by this gene is a E3 ubiquitin protein ligase that targets LIM domain binding 1 (LDB1/CLIM) for proteasome-dependent degradation1. This protein and LDB1 are co-repressors of LHX1/LIM-1, a homeodomain transcription factor. By targeting ZFP42 for degradation, RLIM acts as an activator of random inactivation of X chromosome in the embryo.

External Links

        

References

Type
Title
Type of Disorder
Associated Disorders
Author, Year
Primary
Syndromic X-linked intellectual disability segregating with a missense variant in RLIM.
ASD, ID
Support
Genomic reanalysis of a pan-European rare-disease resource yields new diagnoses
ASD, DD, ID, epilepsy/seizures
Recent Recommendation
RLIM Is a Candidate Dosage-Sensitive Gene for Individuals with Varying Duplications of Xq13, Intellectual Disability, and Distinct Facial Features
ID
ASD/autistic features
Recent Recommendation
RNF12 X-Linked Intellectual Disability Mutations Disrupt E3 Ligase Activity and Neural Differentiation.
Recent Recommendation
Pathogenic variants in E3 ubiquitin ligase RLIM/RNF12 lead to a syndromic X-linked intellectual disability and behavior disorder.
Recent Recommendation
X-exome sequencing of 405 unresolved families identifies seven novel intellectual disability genes
ID

Rare

Variant ID
Variant Type
Allele Change
Residue Change
Inheritance Pattern
Inheritance Association
Family Type
Author, Year
 GEN708R001 
 missense_variant 
 c.1067A>G 
 p.Tyr356Cys 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R002 
 missense_variant 
 c.1760C>G 
 p.Pro587Arg 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R003 
 missense_variant 
 c.1159C>T 
 p.Arg387Cys 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R004 
 missense_variant 
 c.1795C>T 
 p.Arg599Cys 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R005 
 missense_variant 
 c.230C>T 
 p.Pro77Leu 
 Familial 
 Maternal 
 Simplex 
 GEN708R006 
 missense_variant 
 c.1093C>T 
 p.Arg365Cys 
 Familial 
 Maternal 
 Multiplex 
 GEN708R007 
 missense_variant 
 c.1729T>C 
 p.Tyr577His 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R008 
 missense_variant 
 c.1792G>A 
 p.Asp598Asn 
 Familial 
 Maternal 
 Multi-generational 
 GEN708R009 
 missense_variant 
 c.1831C>T 
 p.Arg611Cys 
 Familial 
 Maternal 
 Extended multiplex 
 GEN708R010 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Simplex 
 GEN708R011 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Multi-generational 
 GEN708R012 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Simplex 
 GEN708R013 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Multiplex 
 GEN708R014 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Simplex 
 GEN708R015 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Simplex 
 GEN708R016 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Extended multiplex 
 GEN708R017 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Extended multiplex 
 GEN708R018 
 copy_number_gain 
  
  
 Familial 
 Maternal 
 Multiplex 
 GEN708R019 
 missense_variant 
 c.366G>C 
 p.Trp122Cys 
 Familial 
 Maternal 
  
 GEN708R020 
 stop_gained 
 c.52C>T 
 p.Gln18Ter 
 Unknown 
  
 Simplex 

Common

No Common Variants Available
Chromosome
CNV Locus
CNV Type
# of studies
Animal Model
X
Deletion
 1
 
X
Duplication
 1
 
X
Deletion
 1
 
X
Deletion-Duplication
 22
 
X
Deletion
 2
 
X
Duplication
 2
 
X
Duplication
 1
 
X
Duplication
 1
 
X
Duplication
 1
 
X
Duplication
 8
 
X
Duplication
 5
 
X
Duplication
 1
 

Z_RLIM_1_KD_HM_P.PRO77LEU

Rescue Type: RESCUE-Genetic
Rescue Paradigm: Zebrafish larvae at one- to two-cell stage were injected with 2ng splice-blocking morpholino against the third exonintron junction of rlim. Additionally, Pro77Leu patient-specific missense change was introduced into the full-length RLIM construct by site-directed mutagenesis and injected (100 pg) into the larvae.

Z_RLIM_1_KD_HM_P.PRO77LEU

Category
Entity
Effect on phenotype Qualification
Restored Treatment improves measured phenotype significantly
Refractory Treatment does not improve measured phenotype (was expected to do so)
Ameliorated Treatment provides partial correction or improvement of measured phenotype
No adverse effect Treatment does not affect the parameter adversely
Sustained effect Treatment has long term effect of restoration or amelioration, tested AFTER stopping administration (not applied for continuing long-term treatment) . Will be applied only where treatment has had restorative effects during administration or in the first battery of tests conducted.
No sustained effect Treatment has no long term of restoration or amelioration detectable, after stopping administration. Will be applied only where treatment has had restorative effects during administration or in the first battery of tests conducted.
Unexpected results Treats an unexpected phenotype
Side effect Exaggerates an unexpected phenotype
Experimental Paradigm
Age at Testing
Brain size1
Refractory
Description: Administration of human mRNA carrying Pro77Leu variant did not rescue the reduction of head size (i.e., microcephaly) in zebrafish morphants.
 Microscopic analysis
 5 dpf
 Not Reported: Circadian sleep/wake cycle, Communications, Developmental profile, Emotion, Immune response, Learning & memory, Maternal behavior, Molecular profile, Motor phenotype, Neurophysiology, Physiological parameters, Repetitive behavior, Seizure, Sensory, Social behavior

Z_RLIM_1_KD_HM

Category
Entity
Quantity
Experimental Paradigm
Age at Testing
 Brain size1
 Decreased
Description: rlim zebrafish morphants showed a significant reduction of the head size (i.e., microcephaly) compared to controls.
 Microscopic analysis
 5 dpf
 Not Reported: Circadian sleep/wake cycle, Communications, Developmental profile, Emotion, Immune response, Learning & memory, Maternal behavior, Molecular profile, Motor phenotype, Neurophysiology, Physiological parameters, Repetitive behavior, Seizure, Sensory, Social behavior

 

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