3OS3

Mitogen-activated protein kinase kinase 1 (MEK1) in complex with CH4858061 and MgATP

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Dual specificity mitogen-activated protein kinase kinase 1	polymer	307	34239.4	1	UniProt (Q02750) Pfam (PF00069) In PDB	Homo sapiens	MAP kinase kinase 1, MAPKK 1, ERK activator kinase 1, MAPK/ERK kinase 1, MEK 1
2	A	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	1	Chemie (ATP)
3	A	2-[(4-ethynyl-2-fluorophenyl)amino]-3,4-difluoro-N-(2-hydroxyethoxy)-5-{[(2-hydroxyethoxy)imino]methyl}benzamide	non-polymer		437.4	1	Chemie (3OS)
4	A	MAGNESIUM ION	non-polymer		24.3	1	Chemie (MG)
5		water	water		18.0	3	Chemie (HOH)

Sequence modifications

A: 62 - 302 (UniProt: Q02750)

PDB	External Database	Details
Met 61	-	expression tag

A: 303 - 393 (UniProt: Q02750)

PDB	External Database	Details
His 394	-	expression tag
His 395	-	expression tag
His 396	-	expression tag
His 397	-	expression tag
His 398	-	expression tag
His 399	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	34239.4
Non-Polymers*	Number of molecules	3
	Total formula weight	968.9
All*	Total formula weight	35208.3

*Water molecules are not included.