May act either alone or in interaction with glutaredoxin as a redox-regulated transcriptional regulator, or as a factor regulating Fe-S cluster biogenesis (Probable). The glutaredoxin-BOLA1 heterodimers bind a labile, oxygen sensitive iron-sulfur cluster (PubMed:24714563). Interacts in vitro with GRXS14, GRXS15, GRXS16 and GRXS17, but not with GRXC5 (PubMed:24203231). Interacts in vivo only with GRXS14 and GRXS16 (PubMed:24203231, PubMed:24714563). The GRXS14-BOLA1 apo-heterodimer model derived from NMR data shows a domain arrangement totally different from the holo-heterodimer showing evidence for a Rieske-type ligation of a [2Fe-2S] cluster. Belongs to the bolA/yrbA family. Truncated N-terminus. Truncated N-terminus.