9I5E

A Coiled Coil Module Strategy for High-Resolution Cryo-EM Structures of Small Proteins for Drug Discovery

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D (A, B)	Isoform 2B of GTPase KRas,APH2	polymer	204	23465.7	2	UniProt (P01116) Pfam (PF00071)	Homo sapiens (human)	K-Ras 2,Ki-Ras,c-K-ras,c-Ki-ras
2	B, C (M, N)	Nanobody 26	polymer	122	13558.9	2		Lama glama
3	E, J (A, B)	{(2S)-4-[7-(8-chloronaphthalen-1-yl)-2-{[(2S)-1-methylpyrrolidin-2-yl]methoxy}-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-4-yl]-1-[(2S)-2-fluoropropanoyl]piperazin-2-yl}acetonitrile	non-polymer		606.1	2	Chemie (M1X)
4	F, H (A, B)	GUANOSINE-5'-DIPHOSPHATE	non-polymer		443.2	2	Chemie (GDP)
5	G, I (A, B)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)

Sequence modifications

A, B: 1 - 164 (UniProt: P01116)

PDB	External Database	Details
Cys 12	Gly 12	variant

A, B: 165 - 204 (PDB: 9I5E)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	74049.0
Non-Polymers*	Number of molecules	6
	Total formula weight	2147.3
All*	Total formula weight	76196.3

*Water molecules are not included.