Table 1. Proteins with a similar fold to BBK01, as identified by DALI analysis.

No.	Protein	Organism	PDB ID	Z score	RMSD (Å)	Identity (%)	N residues
1.	Structural maintenance of chromosomes protein 2 (SMC)	Saccharomyces cerevisiae	4rsi-A	9.2	3.49	13	191
2.	Chromosome partition protein (SMC) (residues 463–719)	Geobacillus stearothermophilus 10	5h69-A	9.2	2.29	4	81
3.	Chromosome partition protein (SMC)	Pyrococcus furiosus	4rsj-A	9.0	3.92	8	106
4.	DNA double-strand break repair Rad50 ATPase (SMC)	Pyrococcus furiosus	1l8d-A	10.4	2.94	12	90
5.	Invasin IpaB	Shigella flexneri	5wkq-A	10.3	1.61	10	77
6.	Cytoplasmic dynein 1 heavy chain 1 (residues 3207–3483)	Mus musculus	3wuq-A	10.3	2.53	10	91
7.	Charged multivesicular body protein 4b (residues 23–97)	Homo sapiens	4abm-A	10.2	1.85	10	76
8.	Prefoldin subunit beta	Pyrococcus horikoshii	2zdi-B	10.1	1.54	7	46
9.	Prefoldin subunit beta	Methanothermobacter thermautotrophicus	1fxk-B	9.8	1.93	8	47
10.	Chromatin modification-related protein YNG2	Saccharomyces cerevisiae	5j9q-D	9.4	3.55	6	56
11.	Lysine-specific histone demethylase 1A	Homo sapiens	2x0l-A	10.7	3.98	9	118
12.	Membrane fusion protein (MFP) family protein	Serratia marcescens	5nen-A	10.8	3.77	5	112
13.	Centrosomal protein of 57 kDa	Homo sapiens	4l0r-A	10.7	1.54	7	37