This domain occurs in proteins that have been annotated as Fibronectin/fibrinogen binding protein by similarity. This annotation comes from Swiss:O34693 where the N-terminal region is involved in this activity [1]. It is an RNA binding domain of the NFACT (NEMF, FbpA, Caliban, and Tae2) proteins. This NFACT-R family is found in two eukaryotic gene contexts: fused to the NFACT-N and NFACT-C domains in the NFACT protein involved in the ribosomal quality control pathway which contributes to CAT-tailing and as a standalone domain [2]. Additionally this domain contains a conserved motif D/E-X-W/Y-X-H that may be functionally important.

1: Cloning, sequencing, and expression of a fibronectin/fibrinogen-binding protein from group A streptococci. Courtney HS, Li Y, Dale JB, Hasty DL; Infect Immun 1994;62:3937-3946. PMID:8063411

2: A highly conserved family of domains related to the DNA-glycosylase fold helps predict multiple novel pathways for RNA modifications. Burroughs AM, Aravind L; RNA Biol. 2014;11:360-372. PMID:24646681