Case#: Variant not associated with a proband. Variant listed in supplementary materials in Supplementary Table 4

DiseaseAssertion: Mucopolysaccharidosis type I, MPS I

FamilyInfo: N/A

CasePresentingHPOs:

CaseHPOFreeText:

CaseNotHPOs:

CaseNotHPOFreeText:

CaseEnzymeAssay: N/A

CaseUrineGAGs: N/A

CaseERT: N/A

CaseBMT: N/A

Variant1: A361T

Variant1ClinVarID: 92624

Variant1CAID: CA145865

Variant2: N/A

Variant2ClinVarID: N/A

Variant2CAID: N/A

AdditionalVariants: N/A

ParentalGenotype: N/A

PreviouslyPublished: N/A

Case#: Patient 8, male

DiseaseAssertion: MPS I

FamilyInfo: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CaseEnzymeAssay: Low IDUA enzyme activity 1.50 (Ref. 4.87 ~ 54.70 μmol/g protein/h)

CaseUrineGAGs: Negative GAG tests

CaseERT: N/A

CaseBMT: N/A

Variant1: c.1081G>A (p.A361T)

Variant1ClinVarID: 92624

Variant1CAID: CA145865

Variant2: c.1395delC (p.G466Afs*?)

Variant2ClinVarID: 929236

Variant2CAID: CA549264595

AdditionalVariants: N/A

ParentalGenotype: N/A

PreviouslyPublished N/A