ZRSR2 c.621G>A, p.Thr207=
NM_005089.3:c.621G>A
COSMIC ID: COSM3035265
Variant of Uncertain Significance (VUS)
This synonymous ZRSR2 c.621G>A variant is extremely rare (PM2) and computational evidence indicates no impact on splicing or protein function (BP4, BP7), but lacks functional, segregation, or clinical data to classify as benign or pathogenic. Therefore, it remains a Variant of Uncertain Significance.
ACMG/AMP Criteria Applied
PM2
BP4
BP7
Genetic Information
Gene & Transcript Details
Gene
ZRSR2
Transcript
NM_005089.4
MANE Select
Total Exons
11
Strand
Forward (+)
Reference Sequence
NC_000023.10
Alternative Transcripts
| ID | Status | Details |
|---|---|---|
| NM_005089.1 | Alternative | 11 exons | Forward |
| NM_005089.2 | Alternative | 11 exons | Forward |
| NM_005089.3 | RefSeq Select | 11 exons | Forward |
Variant Details
HGVS Notation
NM_005089.3:c.621G>A
Protein Change
T207=
Location
Exon 8
(Exon 8 of 11)
5'Exon Structure (11 total)3'
Functional Consequence
Loss of Function
Related Variants
Alternate Identifiers
COSM3035265
Variant interpretation based on transcript NM_005089.4
Genome Browser
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HGVS InputNM_005089:c.621G>A
Active Tracks
ConservationRefSeqClinVargnomAD
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Clinical Data
Global Frequency
0.00659%
Rare
Highest in Population
East Asian
0.0729%
Common
Global: 0.00659%
East Asian: 0.0729%
0%
0.05%
0.1%
1%
5%
10%+
Allele Information
Total: 182180Alt: 12Homozygotes: 0
ACMG Criteria Applied
PM2
This variant is present in gnomAD (MAF= 0.00659%, 12/182180 alleles, homozygotes = 0) and at a higher frequency in the East Asian population (MAF= 0.0729%, 10/13714 alleles, homozygotes = 0). The variant is rare (MAF < 0.1%), supporting PM2 criterion application.
Classification
Unknown
Publications (0)
No publication details.
Clinical Statement
Functional Impact
Functional Domain
Hotspot Status
Not a hotspot
Domain Summary
This variant is not located in a mutational hotspot or critical domain (0 mutations).
Related Variants in This Domain
Computational Analysis
Pathogenicity Predictions
Predictor Consensus
Mixed/VUS
PP3 Applied
No
Additional Predictors
Benign:
CADD: -0.12
VCEP Guidelines
Applied ACMG/AMP Criteria (VCEP Specific)
PVS1
PVS1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PVS1 is: "PVS1 – Null variant in a gene where loss of function (LoF) is a known mechanism of disease (e.g., nonsense, frameshift, canonical ±1 or 2 splice sites, initiation codon, single or multi-exon deletion in a LoF gene)". The evidence for this variant shows: it is a synonymous variant (T207=) and does not introduce a null effect. Therefore, this criterion is not applied.
PS1
PS1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PS1 is: "PS1 – Same amino acid change as a previously established pathogenic variant regardless of nucleotide change". The evidence for this variant shows: it is synonymous (no amino acid change), so it cannot match a known pathogenic amino acid change. Therefore, this criterion is not applied.
PS2
PS2 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PS2 is: "PS2 – De novo (both maternity and paternity confirmed) in a patient with the disease and no family history". The evidence for this variant shows: no de novo data are available. Therefore, this criterion is not applied.
PS3
PS3 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PS3 is: "PS3 – Well-established functional studies supportive of a damaging effect on the gene or gene product". The evidence for this variant shows: no functional studies have been performed. Therefore, this criterion is not applied.
PS4
PS4 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PS4 is: "PS4 – Prevalence in affected individuals significantly increased compared with controls". The evidence for this variant shows: no case–control or affected individual data are available. Therefore, this criterion is not applied.
PM1
PM1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PM1 is: "PM1 – Located in a mutational hot spot or well‐established functional domain without benign variation". The evidence for this variant shows: it is a synonymous change outside annotated functional domains. Therefore, this criterion is not applied.
PM2
PM2 (Moderate)
According to standard ACMG guidelines, the rule for PM2 is: "PM2 – Absent from controls (or at extremely low frequency if recessive)". The evidence for this variant shows: MAF = 0.00659% in gnomAD, which is extremely low (<0.1%). Therefore, this criterion is applied at Moderate strength because the variant is absent or at extremely low frequency in population databases.
PM3
PM3 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PM3 is: "PM3 – Detected in trans with a pathogenic variant (for recessive disorders)". The evidence for this variant shows: no data on trans configuration with a pathogenic variant. Therefore, this criterion is not applied.
PM4
PM4 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PM4 is: "PM4 – Protein length changes due to in-frame deletions/insertions or stop-loss variants". The evidence for this variant shows: it is synonymous and does not change protein length. Therefore, this criterion is not applied.
PM5
PM5 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PM5 is: "PM5 – Novel missense change at an amino acid residue where a different pathogenic missense change has been seen". The evidence for this variant shows: it is synonymous, not missense. Therefore, this criterion is not applied.
PM6
PM6 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PM6 is: "PM6 – Assumed de novo, but without confirmation of paternity and maternity". The evidence for this variant shows: no de novo information. Therefore, this criterion is not applied.
PP1
PP1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PP1 is: "PP1 – Co-segregation with disease in multiple affected family members". The evidence for this variant shows: no segregation data. Therefore, this criterion is not applied.
PP2
PP2 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PP2 is: "PP2 – Missense variant in a gene with a low rate of benign missense variation and where missense variants are a common mechanism of disease". The evidence for this variant shows: it is synonymous, not missense. Therefore, this criterion is not applied.
PP3
PP3 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PP3 is: "PP3 – Multiple lines of computational evidence support a deleterious effect on the gene/gene product". The evidence for this variant shows: in silico predictors indicate no deleterious effect (SpliceAI 0.04, CADD -0.12). Therefore, this criterion is not applied.
PP4
PP4 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PP4 is: "PP4 – Patient’s phenotype or family history is highly specific for a disease with a single genetic etiology". The evidence for this variant shows: no phenotype data. Therefore, this criterion is not applied.
PP5
PP5 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for PP5 is: "PP5 – Reputable source reports variant as pathogenic, but without accessible evidence". The evidence for this variant shows: not reported in ClinVar or other sources. Therefore, this criterion is not applied.
BA1
BA1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BA1 is: "BA1 – Allele frequency is too high for the disorder". The evidence for this variant shows: MAF = 0.00659%, far below any BA1 threshold. Therefore, this criterion is not applied.
BS1
BS1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BS1 is: "BS1 – Allele frequency is greater than expected for the disorder". The evidence for this variant shows: MAF is very low, not greater than expected. Therefore, this criterion is not applied.
BS2
BS2 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BS2 is: "BS2 – Observed in healthy adult individuals for a dominant (with full penetrance expected at an early age), X‐linked or mitochondrial disorder with full penetrance expected at an early age". The evidence for this variant shows: no data on healthy adult observations. Therefore, this criterion is not applied.
BS3
BS3 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BS3 is: "BS3 – Well‐established functional studies show no damaging effect on protein function or splicing". The evidence for this variant shows: no functional studies performed. Therefore, this criterion is not applied.
BS4
BS4 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BS4 is: "BS4 – Lack of segregation in affected family members". The evidence for this variant shows: no segregation data. Therefore, this criterion is not applied.
BP1
BP1 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BP1 is: "BP1 – Missense variant in a gene where only LoF causes disease". The evidence for this variant shows: it is synonymous, not missense. Therefore, this criterion is not applied.
BP2
BP2 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BP2 is: "BP2 – Observed in trans with a pathogenic variant for dominant disorders or in cis with a pathogenic variant". The evidence for this variant shows: no data on phase with other variants. Therefore, this criterion is not applied.
BP3
BP3 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BP3 is: "BP3 – In-frame deletions/insertions in a repetitive region without a known function". The evidence for this variant shows: it is synonymous, not an in-frame indel. Therefore, this criterion is not applied.
BP4
BP4 (Supporting)
According to standard ACMG guidelines, the rule for BP4 is: "BP4 – Multiple lines of computational evidence suggest no impact on gene or gene product". The evidence for this variant shows: SpliceAI maximum score 0.04 (below threshold), CADD score -0.12, and other in silico predictors indicate no deleterious effect. Therefore, this criterion is applied at Supporting strength because computational evidence supports a benign interpretation.
BP5
BP5 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BP5 is: "BP5 – Variant found in a case with an alternate molecular basis for disease". The evidence for this variant shows: no case reports with alternate molecular diagnoses. Therefore, this criterion is not applied.
BP6
BP6 (Not Applied) Strength Modified
According to standard ACMG guidelines, the rule for BP6 is: "BP6 – Reputable source reports variant as benign, but without accessible evidence". The evidence for this variant shows: not reported in ClinVar or other sources as benign. Therefore, this criterion is not applied.
BP7
BP7 (Supporting)
According to standard ACMG guidelines, the rule for BP7 is: "BP7 – Synonymous variant with no predicted impact on splicing". The evidence for this variant shows: it is synonymous (T207=) and splicing predictors (SpliceAI max score 0.04) do not indicate impact. Therefore, this criterion is applied at Supporting strength because it is a silent change without splicing effect.