7Z6S

MATCAP bound to a human 14 protofilament microtubule

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, K	Tubulin alpha-1B chain	polymer	457	51033.3	2	UniProt (P68363) Pfam (PF00091) Pfam (PF03953) In PDB	Homo sapiens (human)	Alpha-tubulin ubiquitous,Tubulin K-alpha-1,Tubulin alpha-ubiquitous chain
2	B, H	Tubulin beta-3 chain	polymer	456	51276.4	2	UniProt (Q13509) Pfam (PF00091) Pfam (PF03953) In PDB	Homo sapiens (human)	Tubulin beta-4 chain,Tubulin beta-III
3	C, E	Uncharacterized protein KIAA0895-like	polymer	471	53519.8	2	UniProt (Q68EN5) Pfam (PF08014) In PDB	Homo sapiens (human)
4	A, K	GUANOSINE-5'-TRIPHOSPHATE	non-polymer		523.2	2	Chemie (GTP)
5	A, K	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
6	B, H	GUANOSINE-5'-DIPHOSPHATE	non-polymer		443.2	2	Chemie (GDP)
7	C, E	ZINC ION	non-polymer		65.4	2	Chemie (ZN)

Sequence modifications

A, K: 1 - 451 (UniProt: P68363)

PDB	External Database	Details
His 37	-	insertion
His 37	-	insertion
His 37	-	insertion
His 40	-	insertion
His 41	-	insertion
His 42	-	insertion

B, H: 1 - 450 (UniProt: Q13509)

PDB	External Database	Details
Glu 451	-	expression tag
Asn 452	-	expression tag
Leu 453	-	expression tag
Tyr 454	-	expression tag
Phe 455	-	expression tag
Gln 456	-	expression tag

C, E: 1 - 471 (UniProt: Q68EN5)

PDB	External Database	Details
Gln 281	Glu 281	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	311659.1
Non-Polymers*	Number of molecules	8
	Total formula weight	2112.2
All*	Total formula weight	313771.3

*Water molecules are not included.