Verify the genomic mappings manually

To get the genomic coordinates for a mutation in a given gene use ENSEMBL gene page → Genetic Variation → Variant table, filter by Consequence (missense) and AA cord (under other columns), for example.

Example link for GRCh37: https://grch37.ensembl.org/Homo_sapiens/Gene/Variation_Gene/Table?db=core;g=ENSG00000029363