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Undiagnosed metabolic disorders v1.619 SLC6A19 Achchuthan Shanmugasundram changed review comment from: Comment on mode of inheritance: As reviewed by Tracy Lester, SLC6A19 is associated with Hartnup disorder (MIM #234500), which is caused by biallelic variants. SLC6A19 is currently associated with Hyperglycinuria (MIM #138500) and Iminoglycinuria (MIM #242600) in both PanelApp and PanelApp Australia and hence the MOI was set to both monoallelic and biallelic. However, these phenotypes are caused by SLC36A2.

The association in PanelApp was due to the speculation in PMID:19033659 that combination of variants in SLC36A2 with variants in SLC6A20 or SLC6A19 may have contributed to these phenotypes in three of the reported families. The identified variant from SLC6A19 has now been classified as polymorphism because it was present in 62,195 of 282,492 alleles and in 7,227 homozygotes in the gnomAD database (v2.1.1), for an allele frequency of 0.2202 (https://www.omim.org/entry/608893?search=slc6a19&highlight=slc6a19#allelicVariants).

Hence, the MOI should be updated to 'BIALLELIC, autosomal or pseudoautosomal' in the next GMS update.; to: Comment on mode of inheritance: As reviewed by Tracy Lester, SLC6A19 is associated with Hartnup disorder (MIM #234500), which is caused by biallelic variants. SLC6A19 is currently associated with Hyperglycinuria (MIM #138500) and Iminoglycinuria (MIM #242600) in both PanelApp and PanelApp Australia and hence the MOI was set to both monoallelic and biallelic. However, these phenotypes are caused by SLC36A2.

The association in PanelApp was due to the speculation in PMID:19033659 that combination of variants in SLC36A2 with variants in SLC6A20 or SLC6A19 may have contributed to these phenotypes in three of the reported families. The identified variant from SLC6A19 has now been classified as polymorphism because it was present in 62,195 of 282,492 alleles and in 7,227 homozygotes in the gnomAD database (v2.1.1), for an allele frequency of 0.2202 (https://www.omim.org/entry/608893?search=slc6a19&highlight=slc6a19#allelicVariants).

Hence, the MOI should be updated to 'BIALLELIC, autosomal or pseudoautosomal' in this panel.
Undiagnosed metabolic disorders v1.618 SLC6A19 Achchuthan Shanmugasundram Added comment: Comment on mode of inheritance: As reviewed by Tracy Lester, SLC6A19 is associated with Hartnup disorder (MIM #234500), which is caused by biallelic variants. SLC6A19 is currently associated with Hyperglycinuria (MIM #138500) and Iminoglycinuria (MIM #242600) in both PanelApp and PanelApp Australia and hence the MOI was set to both monoallelic and biallelic. However, these phenotypes are caused by SLC36A2.

The association in PanelApp was due to the speculation in PMID:19033659 that combination of variants in SLC36A2 with variants in SLC6A20 or SLC6A19 may have contributed to these phenotypes in three of the reported families. The identified variant from SLC6A19 has now been classified as polymorphism because it was present in 62,195 of 282,492 alleles and in 7,227 homozygotes in the gnomAD database (v2.1.1), for an allele frequency of 0.2202 (https://www.omim.org/entry/608893?search=slc6a19&highlight=slc6a19#allelicVariants).

Hence, the MOI should be updated to 'BIALLELIC, autosomal or pseudoautosomal' in the next GMS update.
Undiagnosed metabolic disorders v1.446 SLC36A2 Arina Puzriakova Source: Expert Review Amber was removed from gene: SLC36A2
Undiagnosed metabolic disorders SLC36A2 Arianna Tucci reviewed SLC36A2
Undiagnosed metabolic disorders SLC36A2 Sarah Leigh classified SLC36A2 as red
Undiagnosed metabolic disorders SLC36A2 Sarah Leigh reviewed SLC36A2