4UPU: IP3 3-K calmodulin binding region

Crystal structure of IP3 3-K calmodulin binding region in complex with Calmodulin. Determined by X-ray diffraction at 2.34 Å resolution. Released 20 Aug 2014.

Method: X-ray diffraction
Resolution: 2.34 Å
Organism: HOMO SAPIENS
Chains: 2
Atoms: 1,410
Mol. weight: 20.04 kDa
Ligands: CA
Released: 20 Aug 2014

Explore 4UPU in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

4UPU contains 9 α-helices and 4 β-strands across 2 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 8 helices, 4 β-strands

Element	Residues	Length	Sheet
α-helix	7-20	14
β-strand	27-28	2	1
α-helix	30-39	10
α-helix	46-56	11
β-strand	64-65	2	1
α-helix	66-76	11
α-helix	83-93	11
β-strand	100-101	2	2
α-helix	103-112	10
α-helix	119-129	11
β-strand	137-138	2	2
α-helix	139-147	9

Chain B: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	166-174	9

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Calmodulin	A	protein	148	HOMO SAPIENS	P0DP23 (AlphaFold model)
Inositol-trisphosphate 3-kinase A	B	protein	26	HOMO SAPIENS	P23677 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>4UPU_1 CALMODULIN (chains A)
ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGN
GTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEE
VDEMIREADIDGDGQVNYEEFVQMMTAK

Sequence of entity 2 (B), FASTA

>4UPU_2 INOSITOL-TRISPHOSPHATE 3-KINASE A (chains B)
GEDVGQKNHWQKIRTMVNLPVISPFK

Ligands and cofactors

ID	Name	Formula	Copies
CA	Calcium ion	Ca	5

Water and common crystallization additives (GOL) are not listed.

Primary citation

A New Calmodulin Binding Motif for Inositol 1,4,5-Trisphosphate 3-Kinase Regulation. Franco-Echevarria, E., Banos-Sanz, J.I., Monterroso, B. et al. Biochem J (2014) 463:319. DOI 10.1042/BJ20140757 · PubMed

Other PDB entries of the same protein (UniProt P0DP23 (AlphaFold model), which also has an AlphaFold model), best resolution first:

9MXD 1.17 Å, Human E104A calmodulin:MLCK RM20 complex
7BF1 1.24 Å, Ca2+-Calmodulin in complex with peptide from brain-type creatine kinase in extended 1:2…
6XXX 1.25 Å, 1.25 Angstrom crystal structure of Ca/CaM A102V:RyR2 peptide complex
4DJC 1.35 Å, 1.35 A crystal structure of the NaV1.5 DIII-IV-Ca/CaM complex
7BF2 1.43 Å, Ca2+-Calmodulin in complex with human muscle form creatine kinase peptide in extended…
2F3Y 1.45 Å, Calmodulin/IQ domain complex
2W73 1.45 Å, High-resolution structure of the complex between calmodulin and a peptide from…
4LZX 1.5 Å, Complex of IQCG and Ca2+-free CaM
5V03 1.58 Å, A positive allosteric modulator binding pocket in SK2 ion channels is shared by Riluzole…
9MVW 1.58 Å, Crystal structure of S101F calmodulin - CaM:RM20 analog complex
2F3Z 1.6 Å, Calmodulin/IQ-AA domain complex
6M7H 1.6 Å, Structure of calmodulin with KN93

Browse structure collections

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