PANTHER

Homepage Link: https://pantherdb.org/about.jsp

Description: The Protein ANalysis THrough Evolutionary Relationships (PANTHER) classification system provides an openly-available annotation library of gene-family phylogenetic trees, with persistent identifiers attached to all nodes in the trees and annotation of each protein member of the family by its family and protein class, subfamily, orthologs, paralogs, GO Phylogenetic Annotation Project function, and Reactome pathways.

Example record: KCMF1 HGNC:20589 (human) has the ortholog Kcmf1 MGI:1921537 (mouse), see the orthologs section of the KCMF1 page