About HTRA1
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 uncertain. Select a step to read what it means.
Uncertain.The recorded classification is uncertain significance.
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.
The variant p.Ala445Thr is located within the peptidase S1 (trypsin-like serine protease) domain (residues 157–473), a well-established critical functional domain. Loss of HTRA1 protease activity through missense variants in this domain is the established mechanism for cerebral small vessel disease (CARASIL/CADASIL2). Published literature confirms that missense variants clustering in the protease domain are a common cause of monogenic CSVD.
This variant is present at very low frequency in population databases. gnomAD v2.1 reports an allele frequency of 0.01237% (35/282,868 alleles, 0 homozygotes) and gnomAD v4.1 reports 0.01041% (168/1,613,814 alleles, 0 homozygotes). Both are well below the 0.1% threshold for PM2. The variant is absent from gnomAD-Canada v1.0. The highest subpopulation frequency is 0.028% (Admixed American, v2.1) and 0.083% (Middle Eastern, v4.1), both below 0.1%.
Multiple lines of computational evidence suggest no impact on the gene product. REVEL score is 0.133 (well below pathogenic threshold of 0.5). BayesDel score is -0.219368 (negative, consistent with a benign prediction). SpliceAI predicts no splice alteration (max delta = 0.00). These three independent in silico predictors converge on a neutral/benign interpretation.
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: PM1 supporting, PM2 supporting, BP4 supporting benign; combination = 2 supporting + 1 supporting benign, which maps to VUS because the evidence is conflicting.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 168 / 1,613,814 alleles. Recorded AF 0.000104101. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 0.000123733; MAF= 0.01237%, 35/282868 alleles, homozygotes = 0) and has highest observed frequency in the Admixed American population (AF= 0.000282167; MAF= 0.02822%, 10/35440 alleles, homozygotes = 0); grpmax FAF= 0.00015644.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
7 Uncertain significance.
No standalone functional evidence summary is recorded in evidence_summary.functional.
This variant has previously been reported in somatic cancers (COSMIC; COSV64564366, n = 1 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.
26 criteria with recorded statuses: 3 met · 19 not met · 2 not assessed · 2 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_002775.4:c.1333G>A (p.Ala445Thr) is a missense variant in HTRA1 located within the peptidase S1 serine protease domain (residues 157–473), a well-established functional domain critical for HTRA1 protease activity. Loss-of-function missense variants in this domain are a known cause of cerebral small vessel disease including CARASIL and CADASIL2.
This variant is present at very low frequency in population databases: gnomAD v2.1 allele frequency is 0.012% (35/282,868 alleles, 0 homozygotes) and gnomAD v4.1 allele frequency is 0.010% (168/1,613,814 alleles, 0 homozygotes). The variant is absent from gnomAD-Canada. All frequencies fall well below the 0.1% PM2 threshold.
Multiple in silico predictors suggest a neutral effect: REVEL score is 0.133 (below pathogenic threshold), BayesDel score is −0.219 (negative, favoring benign), and SpliceAI predicts no splice alteration (max delta = 0.00). These orthogonal computational lines of evidence support a benign interpretation.
This variant has been reported in ClinVar (Variation ID 877269) as Uncertain significance by 8 clinical submitters with no expert panel review. No pathogenic or benign assertions have been made by a reputable source. All 16 associated PMIDs are policy or guideline documents unrelated to this specific variant.
No functional studies (PS3/BS3), case-control data (PS4), de novo observations (PS2/PM6), segregation data (PP1/BS4), or same-residue pathogenic comparators (PS5/PM5) were identified for this variant in the published literature or databases.
Applying generic ACMG/AMP 2015 combination rules: PM1_Supporting + PM2_Supporting versus BP4_Supporting results in two opposing supporting-level criteria. Since no criterion reaches moderate or higher strength on either side, and the evidence is balanced with low-confidence signals in both directions, the final classification defaults to Variant of Uncertain Significance (VUS).
No criteria match.
No further detail was recorded.
Every interpreted variant in HTRA1, mapped onto the exon structure of NM_002775.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| Middle Eastern5 / 6,030 | 0.00083 |
| Remaining individuals21 / 62,492 | 0.00034 |
| African/African American20 / 75,008 | 0.00027 |
| Admixed American13 / 60,014 | 0.00022 |
| European (non-Finnish)105 / 1,179,802 | 8.9e-05 |
| South Asian3 / 91,064 | 3.3e-05 |
| East Asian1 / 44,866 | 2.2e-05 |
| Admixed American10 / 35,440 | 0.00028 |
| Remaining individuals2 / 7,224 | 0.00028 |
| African/African American5 / 24,958 | 0.0002 |
| European (non-Finnish)17 / 129,188 | 0.00013 |
| South Asian1 / 30,616 | 3.3e-05 |
This variant is present in gnomAD v4.1 (AF= 0.000104101; MAF= 0.01041%, 168/1613814 alleles, homozygotes = 0) and has highest observed frequency in the Middle Eastern population (AF= 0.000829187; MAF= 0.08292%, 5/6030 alleles, homozygotes = 0); grpmax FAF= 0.00032642.
This variant is present in gnomAD v2.1 (AF= 0.000123733; MAF= 0.01237%, 35/282868 alleles, homozygotes = 0) and has highest observed frequency in the Admixed American population (AF= 0.000282167; MAF= 0.02822%, 10/35440 alleles, homozygotes = 0); grpmax FAF= 0.00015644.
No further detail was recorded.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.133. BayesDel score = -0.219368.
14 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= 0.000104101; MAF= 0.01041%, 168/1613814 alleles, homozygotes = 0) and has highest observed frequency in the Middle Eastern population (AF= 0.000829187; MAF= 0.08292%, 5/6030 alleles, homozygotes = 0); grpmax FAF= 0.00032642.
This variant is present in gnomAD v2.1 (AF= 0.000123733; MAF= 0.01237%, 35/282868 alleles, homozygotes = 0) and has highest observed frequency in the Admixed American population (AF= 0.000282167; MAF= 0.02822%, 10/35440 alleles, homozygotes = 0); grpmax FAF= 0.00015644.
This variant has been reported in ClinVar as Uncertain significance (7 clinical laboratories). (ClinVarID = 877269)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.133. BayesDel score = -0.219368.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV64564366, n = 1 times).
This variant does not lie in a statistically significant hotspot.