ClinGenAR Lookup Allele

Look up a genetic variant in the ClinGen Allele Registry by HGVS notation. Returns the canonical allele identifier (CA ID), community standard title, and cross-references to ClinVar, dbSNP, COSMIC, gnomAD, and other databases. The Allele Registry normalizes variant representations across different coordinate systems and nomenclatures. Example: 'NM_000546.6:c.743G>A' returns CA000387 (TP53 p.Arg248Gln) with links to ClinVar, COSMIC, and gnomAD.