This is a family of proteins that from part of the condensin complex that regulates chromosome segregation. This is the A subunit, which binds to the ScpB subunit, Pfam:PF04079, and SMC, Pfam:PF02463, to participate in chromosomal partition during cell division [2,3]. The condensin complex pulls DNA away from the mid-cell into both cell halves [1]. These proteins are part of the Kleisin superfamily.

1: Kleisins: a superfamily of bacterial and eukaryotic SMC protein partners. Schleiffer A, Kaitna S, Maurer-Stroh S, Glotzer M, Nasmyth K, Eisenhaber F; Mol Cell 2003;11:571-575. PMID:12667442

2: An asymmetric SMC-kleisin bridge in prokaryotic condensin. Burmann F, Shin HC, Basquin J, Soh YM, Gimenez-Oya V, Kim YG, Oh BH, Gruber S; Nat Struct Mol Biol. 2013;20:371-379. PMID:23353789

3: Molecular basis of SMC ATPase activation: role of internal structural changes of the regulatory subcomplex ScpAB. Kamada K, Miyata M, Hirano T; Structure. 2013;21:581-594. PMID:23541893