This domain is found in mitochondrial proteins, including FAM210A and B, which contains a transmembrane peptide [1,2,3]. Its function is not clear. FAM210A, a protein essential in maintaining skeletal muscle structure and strength [4], interacts with mitochondrial translation elongation factor EF-Tu and promotes mitochondrial protein expression. In FAM210A, this domain is responsible for binding EF-Tu [3]. FAM210B plays a role in erythroid differentiation and is involved in cell proliferation and tumour cell growth suppression [1,5].

1: Loss of the novel mitochondrial protein FAM210B promotes metastasis via PDK4-dependent metabolic reprogramming. Sun S, Liu J, Zhao M, Han Y, Chen P, Mo Q, Wang B, Chen G, Fang Y, Tian Y, Zhou J, Ma D, Gao Q, Wu P; Cell Death Dis. 2017;8:e2870. PMID:28594398

2: A Multi-Network Comparative Analysis of Transcriptome and Translatome Identifies Novel Hub Genes in Cardiac Remodeling. Boileau E, Doroudgar S, Riechert E, Jurgensen L, Ho TC, Katus HA, Volkers M, Dieterich C; Front Genet. 2020;11:583124. PMID:33304386

3: MicroRNA-574 regulates FAM210A expression and influences pathological cardiac remodeling. Wu J, Venkata Subbaiah KC, Jiang F, Hedaya O, Mohan A, Yang T, Welle K, Ghaemmaghami S, Tang WHW, Small E, Yan C, Yao P; EMBO Mol Med. 2021;13:e12710. PMID:33369227

4: FAM210A is a novel determinant of bone and muscle structure and strength. Tanaka KI, Xue Y, Nguyen-Yamamoto L, Morris JA, Kanazawa I, Sugimoto T, Wing SS, Richards JB, Goltzman D; Proc Natl Acad Sci U S A. 2018;115:E3759. PMID:29618611

5: Identification of a novel putative mitochondrial protein FAM210B associated with erythroid differentiation. Kondo A, Fujiwara T, Okitsu Y, Fukuhara N, Onishi Y, Nakamura Y, Sawada K, Harigae H; Int J Hematol. 2016;103:387-395. PMID:26968549