7UN1

8-nm repeat of the human sperm tip singlet microtubule

This is a non-PDB format compatible entry.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E...	Sperm acrosome-associated protein 9	polymer	222	25209.0	33	UniProt (Q96E40) Pfam (PF15120) In PDB	Homo sapiens (human)
2	AB, AD, AF, BA, BD...	Tubulin beta-4B chain	polymer	445	49877.8	38	UniProt (P68371) Pfam (PF00091) Pfam (PF03953) In PDB	Homo sapiens (human)	Tubulin beta-2 chain,Tubulin beta-2C chain
3	AC, AE, BC, BE, BG...	Tubulin alpha-1A chain	polymer	451	50188.4	38	UniProt (Q71U36) Pfam (PF00091) Pfam (PF03953) In PDB	Homo sapiens (human)	Alpha-tubulin 3,Tubulin B-alpha-1,Tubulin alpha-3 chain
4	CF, FF, IF, LD, DB...	GUANOSINE-5'-DIPHOSPHATE	non-polymer		443.2	38	Chemie (GDP)
5	IE, LC, CG, FG, IG...	GUANOSINE-5'-TRIPHOSPHATE	non-polymer		523.2	38	Chemie (GTP)
6	CE, FE, IE, LC, CG...	MAGNESIUM ION	non-polymer		24.3	38	Chemie (MG)

Contents of the asymmetric unit

Polymers	Number of chains	109
	Total formula weight	4634414.3
Non-Polymers*	Number of molecules	114
	Total formula weight	37646.1
All*	Total formula weight	4672060.4

*Water molecules are not included.