About RECQL4
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. This variant is benign. Select a step to read what it means.
Benign.A benign classification under the recorded framework.
Gene-level background from the recorded interpretation.
Words with a dotted underline have a short definition. Hover or tap them.No gene-level summary was recorded for this case.
The recorded framework is Not recorded. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.
The applied criteria and their strengths are shown as assessed under the stated framework.
No pathogenic criterion marked as applied in the recorded assessment.
This variant is present at high frequency in the general population. The grpmax filtering allele frequency in gnomAD v2.1 is 3.9% (Admixed American population), exceeding the BA1 threshold of >1%. Additionally, 30 homozygotes are observed in gnomAD v2.1 and 41 in v4.1, which is incompatible with a pathogenic variant causing Rothmund-Thomson syndrome (autosomal recessive, severe early-onset disorder).
This variant is present in gnomAD v2.1 at an allele frequency of 0.67%, exceeding the BS1 threshold of >0.3% for general population frequency. This frequency is inconsistent with a pathogenic variant causing Rothmund-Thomson syndrome.
Thirty homozygotes are observed in gnomAD v2.1 and 41 homozygotes in gnomAD v4.1. RECQL4 causes Rothmund-Thomson syndrome (autosomal recessive), a severe disorder with full penetrance expected at an early age. The presence of multiple apparently healthy homozygous adults in a population database is strong evidence that this variant is benign.
This variant has been reported in ClinVar as Benign by 8 clinical laboratories and as Likely benign by 1 clinical laboratory (ClinVar variation ID 135140). Although the aggregate review status is 'criteria provided, single submitter' (1-star), the consistent classification across multiple independent clinical laboratories supports a benign interpretation at supporting strength level.
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: BA1 stand-alone benign, BS1 strong benign, BS2 strong benign, BP6 supporting benign; combination = 1 stand-alone benign + 2 strong benign + 1 supporting benign, which maps to Benign.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 2,479 / 1,574,460 alleles. Recorded AF 0.00157451. Recorded homozygote count 41.
This variant is present in gnomAD v2.1 (AF= 0.00667598; MAF= 0.66760%, 1462/218994 alleles, homozygotes = 30) and has highest observed frequency in the Admixed American population (AF= 0.041093; MAF= 4.10930%, 1158/28180 alleles, homozygotes = 27); grpmax FAF= 0.0390196.
This variant is present in gnomAD-Canada v1.0 (AF= 0.0017917254859376697, 33/18418 alleles, homozygotes = 0).
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
8 Benign · 1 Likely benign. ClinVar API review status: criteria provided, multiple submitters, no conflicts.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. RECQL4 encodes a DNA helicase that is involved in DNA replication and repair. Germline mutations of RECQL4 are associated with Rothmund-Thomson, RAPAD
This variant has previously been reported in somatic cancers (COSMIC; COSV52879881, n = 5 times).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under Not recorded, with the data and sources behind each one.
29 criteria with recorded statuses: 4 met · 10 not met · 7 not assessed · 8 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_004260.3:c.2569_2574del (p.Cys857_Thr858del) is an in-frame deletion of 6 nucleotides in exon 15 of RECQL4, encoding a DNA helicase associated with Rothmund-Thomson syndrome (autosomal recessive) and cancer predisposition.
This variant is present at high frequency in the general population: gnomAD v2.1 reports 1462 alleles out of 218,994 (0.67%) with 30 homozygotes, and a grpmax filtering allele frequency of 3.9% in the Admixed American population. gnomAD v4.1 reports 2479 alleles out of 1,574,460 (0.16%) with 41 homozygotes. The presence of 30 or more healthy homozygotes in population databases is incompatible with pathogenicity for a severe autosomal recessive disorder.
The variant meets BA1 (stand-alone benign): allele frequency exceeds 1% in the general population (grpmax FAF 3.9% in gnomAD v2.1). It also meets BS1 (strong benign): allele frequency exceeds 0.3% (global AF 0.67% in gnomAD v2.1), and BS2 (strong benign): 30 homozygotes are observed in a population database for a recessive disorder expected to be fully penetrant at an early age.
ClinVar reports this variant as Benign by 8 clinical laboratories and Likely benign by 1 laboratory (variation ID 135140), meeting BP6 (supporting benign).
No pathogenic criteria are met. PVS1 is not applicable as this is an in-frame deletion, not a null variant. No functional data (PS3), segregation data (PP1), or case-control data (PS4) support pathogenicity. All in silico evidence (SpliceAI delta 0.00; REVEL/BayesDel unavailable for deletion variants) is neutral. PM2 is not met due to the variant's high population frequency.
Classification: BENIGN. BA1 alone is sufficient for a benign classification per ACMG/AMP 2015 guidelines. The combination of BA1 + BS1 + BS2 + BP6 provides overwhelming evidence of benignity.
No criteria match.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
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No further detail was recorded.
No further detail was recorded.
Every interpreted variant in RECQL4, mapped onto the exon structure of NM_004260.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| Admixed American1615 / 53,676 | 0.0336 hom |
| East Asian525 / 42,554 | 0.0124 hom |
| Remaining individuals89 / 61,074 | 0.00151 hom |
| African/African American71 / 74,132 | 0.00096 |
| South Asian62 / 86,320 | 0.00072 |
| European (non-Finnish)117 / 1,161,036 | 0.0001 |
| Admixed American1158 / 28,180 | 0.04127 hom |
| East Asian232 / 14,878 | 0.0163 hom |
| Remaining individuals20 / 6,048 | 0.0033 |
| African/African American24 / 18,884 | 0.0013 |
| South Asian20 / 25,098 | 0.0008 |
| European (non-Finnish)8 / 95,634 | 8.4e-05 |
This variant is present in gnomAD v4.1 (AF= 0.00157451; MAF= 0.15745%, 2479/1574460 alleles, homozygotes = 41) and has highest observed frequency in the Admixed American population (AF= 0.0300879; MAF= 3.00879%, 1615/53676 alleles, homozygotes = 36); grpmax FAF= 0.0288668.
This variant is present in gnomAD v2.1 (AF= 0.00667598; MAF= 0.66760%, 1462/218994 alleles, homozygotes = 30) and has highest observed frequency in the Admixed American population (AF= 0.041093; MAF= 4.10930%, 1158/28180 alleles, homozygotes = 27); grpmax FAF= 0.0390196.
This variant is present in gnomAD-Canada v1.0 (AF= 0.0017917254859376697, 33/18418 alleles, homozygotes = 0).
No further detail was recorded.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00).
3 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata. None of the listed paper records explicitly indicates that the variant is named.
Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.
The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.
This variant is present in gnomAD v4.1 (AF= 0.00157451; MAF= 0.15745%, 2479/1574460 alleles, homozygotes = 41) and has highest observed frequency in the Admixed American population (AF= 0.0300879; MAF= 3.00879%, 1615/53676 alleles, homozygotes = 36); grpmax FAF= 0.0288668.
This variant is present in gnomAD v2.1 (AF= 0.00667598; MAF= 0.66760%, 1462/218994 alleles, homozygotes = 30) and has highest observed frequency in the Admixed American population (AF= 0.041093; MAF= 4.10930%, 1158/28180 alleles, homozygotes = 27); grpmax FAF= 0.0390196.
This variant is present in gnomAD-Canada v1.0 (AF= 0.0017917254859376697, 33/18418 alleles, homozygotes = 0).
This variant has been reported in ClinVar as Benign (8 clinical laboratories) and as Likely benign (1 clinical laboratory). (ClinVarID = 135140)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00).
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. RECQL4 encodes a DNA helicase that is involved in DNA replication and repair. Germline mutations of RECQL4 are associated with Rothmund-Thomson, RAPAD
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV52879881, n = 5 times).
This variant does not lie in a statistically significant hotspot.