3X2U

Michaelis-like initial complex of cAMP-dependent Protein Kinase Catalytic Subunit.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	cAMP-dependent protein kinase catalytic subunit alpha	polymer	357	41697.4	1	UniProt (P05132) Pfam (PF00069) In PDB	Mus musculus (mouse)	PKA C-alpha
2	S	Substrate Peptide	polymer	20	2199.4	1	UniProt (by SIFTS) (P61925) In PDB	synthetic construct
3	A	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	1	Chemie (ATP)
4	A	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
5		water	water		18.0	197	Chemie (HOH)

Sequence modifications

A: 0 - 350 (UniProt: P05132)

PDB	External Database	Details
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	43896.8
Non-Polymers*	Number of molecules	3
	Total formula weight	555.8
All*	Total formula weight	44452.5

*Water molecules are not included.