8I21

Cryo-EM structure of 6-subunit Smc5/6 arm region

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B	Structural maintenance of chromosomes protein 6	polymer	1114	128199.7	1	UniProt (Q12749) Pfam (PF13476) In PDB	Saccharomyces cerevisiae S288C	DNA repair protein RHC18,Rad18 homolog
2	A	Structural maintenance of chromosomes protein 5	polymer	1093	126237.2	1	UniProt (Q08204) Pfam (PF02463) In PDB	Saccharomyces cerevisiae S288C
3	C	E3 SUMO-protein ligase MMS21	polymer	267	30388.3	1	UniProt (P38632) Pfam (PF22326) Pfam (PF11789) In PDB	Saccharomyces cerevisiae S288C	Non-structural maintenance of chromosome element 2,Non-SMC element 2

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	284825.2
All*	Total formula weight	284825.2

*Water molecules are not included.