Table legend for arvasample.tsv aa_substitution: Amino acid substitution in standard notation (e.g., A123V indicates alanine at position 123 changed to valine) stability_score_0hr: Protein stability percentage at 0 hours post-expression stability_score_24hr: Protein stability percentage at 24 hours post-expression stability_score_48hr: Protein stability percentage at 48 hours post-expression Half-life (hr): Calculated protein half-life in hours, representing the time required for 50% of the protein to degrade The columns listed below are from Supplementary Table S3 of Trinidad et al., 2023 ID: Common identifier for variant; either HGVSp or HGVSc, depending on the mutation. HGVSc: Human Genome Variation Society coding variant, signifying nucleotide modifications. HGVSg_GRCh37: Human Genome Variation Society genomic coordinates for GRCh37 (Genome Reference Consortium Human Build 37). HGVSp: Human Genome Variation Society protein variant, signifying amino acid changes. Finalized severity: Final verdict for variant severity, taking into account patient data and ClinVar annotations, as well as CDS and/or full-length activity assay results. Patient count: Number of individuals in the patient data set who possessed the mutation. Patient references: Details for reference publications associated with the variant and the patient data set. ClinVar pathogenicity: ClinVar’s categorical annotation for variant pathogenicity (e.g. pathogenic, likely pathogenic, benign, not provided). Consequence: ClinVar's descriptor for molecular consequence for variant (e.g. missense variant, splice region variant, frameshift variant). Final assay severity: Overall assay severity, summarizing the results of the CDS and full-length assays. CDS activity severity: Severity determined from the CDS activity assay. Severe mutations have <2% WT-ARSA activity, while moderate variants exhibit 2%–4% WT and mild mutations have 4%–13% WT activity. Any mutation with activity above 13% is considered benign. Full-length activity severity: Severity determined from the full-length activity assay. Severe mutations have <2% WT-ARSA activity, while moderate variants exhibit 2%–4% WT and mild mutations have 4%–13% WT activity. Any mutation with activity above 13% is considered benign. CDS percent WT activity: Percent WT-ARSA activity in CDS assay, averaged across three biological replicates. Full-length percent WT activity: Percent WT-ARSA activity in full-length assay, averaged across three biological replicates. SIFT scores: Continuous pathogenicity score predicted via SIFT model, ranging from 0 to 1, with 1 indicating a tolerated/benign mutation. SIFT group: Categorical pathogenicity annotation predicted via SIFT model (e.g. deleterious, tolerated, tolerated low confidence). PolyPhen scores: Continuous pathogenicity score predicted via PolyPhen model, ranging from 0 to 1, with 0 indicating a tolerated/benign mutation. PolyPhen group: Categorical pathogenicity annotation predicted via PolyPhen model (e.g. benign, probably damaging). All AF: Overall allele frequency across all populations listed in gnomAD. African AF – Other AF: Columns showing variant allele frequencies in the denoted populations. Inbreeding coefficient: Variant’s inbreeding coefficient from gnomAD. AC: Allele count. AF: Allele frequency calculated from ‘AC’ divided by ‘AN’. AN: Total number of ARSA alleles sequenced in gnomAD. AC African – AC female: Columns showing allele counts for various populations. AN African – AN female: Columns showing the number of ARSA alleles sequenced in each population. Hom African – Hom female: Columns listing the number of homozygotes in gnomAD for each population. Hom raw: Raw unfiltered number of ARSA homozygotes Hom: Total number of ARSA homozygotes present in gnomAD. Comments: Relevant details about variants’ severity in the patient data set, along with notes from reference publications. RS# (dbSNP): Reference SNP, as in dbSNP databse.