7Q1F: CPAP:TUBULIN:IE5 alpharep complex

CPAP:TUBULIN:IE5 alpharep complex. Determined by X-ray diffraction at 2.35 Å resolution. Released 20 Apr 2022.

Method: X-ray diffraction
Resolution: 2.35 Å
Organisms: Ovis aries, synthetic construct, Homo sapiens
Chains: 10
Atoms: 20,262
Mol. weight: 321.46 kDa
Ligands: GTP, MG, GDP, FLC
Released: 20 Apr 2022

Explore 7Q1F in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

7Q1F contains 186 α-helices and 80 β-strands across 10 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: 27 helices, 16 β-strands

Element	Residues	Length	Sheet
β-strand	4-9	6	1
α-helix	10-28	19
α-helix	48-51	4
β-strand	53-56	4	2
β-strand	60-63	4	2
β-strand	65-69	5	1
α-helix	73-80	8
α-helix	89-91	3
β-strand	92-94	3	1
α-helix	103-104	2
α-helix	105-109	5
α-helix	111-113	3
α-helix	115-126	12
β-strand	134-140	7	1
α-helix	144-160	17
β-strand	165-172	8	1
α-helix	183-194	12
β-strand	200-205	6	1
α-helix	206-216	11
α-helix	224-243	20
α-helix	252-259	8
α-helix	268	1
β-strand	269-273	5	3
β-strand	277	1	4
α-helix	284-287	4
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	3
α-helix	307-309	3
β-strand	312-321	10	3
α-helix	325-335	11
α-helix	342	1
β-strand	343	1	3
α-helix	344	1
β-strand	351-356	6	3
α-helix	359-363	5
β-strand	368	1	4
α-helix	369-370	2
β-strand	373-381	9	3
α-helix	382-384	3
α-helix	385-399	15
α-helix	405-409	5
α-helix	415-435	21

Chain B: 25 helices, 21 β-strands

Element	Residues	Length	Sheet
β-strand	3-9	7	5
α-helix	10-28	19
β-strand	30	1	6
β-strand	35	1	7
β-strand	36	1	6
α-helix	42-45	4
α-helix	47-49	3
β-strand	51-56	4	7
β-strand	60-63	4	7
β-strand	65-69	5	5
α-helix	72-80	9
α-helix	89-91	3
β-strand	92-94	3	5
α-helix	103-107	5
α-helix	110-127	18
β-strand	132-140	9	5
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	5
β-strand	178	1	8
α-helix	183-197	15
β-strand	200-205	6	5
α-helix	206-211	6
α-helix	212-216	5
β-strand	223	1	9
α-helix	224-243	20
α-helix	252-259	8
β-strand	267-268	2	5
β-strand	269-273	5	10
α-helix	285-287	3
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	10
α-helix	307-309	3
β-strand	312-321	10	10
α-helix	325-338	14
α-helix	340-342	3
β-strand	343	1	10
β-strand	351-356	6	10
α-helix	359-360	2
β-strand	373-381	9	10
α-helix	382-384	3
α-helix	385-399	15
α-helix	406-409	4
β-strand	413	1	11
α-helix	416-437	22

Chains C and T: 20 helices, 0 β-strands

Element	Residues	Length
α-helix	13-21	9
α-helix	22-24	3
α-helix	28-41	14
α-helix	44-46	3
α-helix	47-53	7
α-helix	59-72	14
α-helix	75-77	3
α-helix	78-84	7
α-helix	90-103	14
α-helix	106-108	3
α-helix	109-115	7
α-helix	121-134	14
α-helix	137-139	3
α-helix	140-146	7
α-helix	152-165	14
α-helix	168-170	3
α-helix	171-177	7
α-helix	183-196	14
α-helix	198-211	14
α-helix	215-226	12

Chain D: 15 helices, 0 β-strands

Element	Residues	Length
α-helix	14-21	8
α-helix	22-24	3
α-helix	28-41	14
α-helix	44-46	3
α-helix	47-53	7
α-helix	59-72	14
α-helix	75-77	3
α-helix	78-84	7
α-helix	90-103	14
α-helix	106-108	3
α-helix	109-115	7
α-helix	121-133	13
α-helix	140-144	5
α-helix	155-164	10
α-helix	172-174	3

Chain P: 8 helices, 3 β-strands

Element	Residues	Length	Sheet
α-helix	322-324	3
α-helix	325	1
β-strand	326	1	9
α-helix	327	1
β-strand	328	1	8
α-helix	339-350	12
α-helix	372	1
β-strand	373	1	11
α-helix	374	1
α-helix	376-377	2
α-helix	382-385	4

Chain R: 27 helices, 18 β-strands

Element	Residues	Length	Sheet
β-strand	4-9	6	12
α-helix	10-28	19
β-strand	35	1	13
α-helix	48-51	4
β-strand	53-55	3	14
β-strand	60	1	13
β-strand	61-63	3	14
β-strand	65-69	5	12
α-helix	73-80	8
α-helix	89-91	3
β-strand	92-94	3	12
α-helix	103-104	2
α-helix	105-109	5
α-helix	111-113	3
α-helix	115-127	13
β-strand	134-140	7	12
α-helix	144	1
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	12
α-helix	183-194	12
β-strand	200-205	6	12
α-helix	206-216	11
α-helix	224-243	20
α-helix	252-259	8
α-helix	268	1
β-strand	269-273	5	15
β-strand	277	1	16
α-helix	284-287	4
α-helix	288-294	7
α-helix	298-300	3
β-strand	301	1	15
α-helix	307-309	3
β-strand	312-321	10	15
α-helix	325-335	11
β-strand	343	1	15
β-strand	351-356	6	15
α-helix	359-363	5
β-strand	368	1	16
α-helix	369-370	2
β-strand	373-381	9	15
α-helix	382-384	3
α-helix	385-399	15
α-helix	405-409	5
α-helix	415-435	21

Chain S: 24 helices, 20 β-strands

Element	Residues	Length	Sheet
β-strand	3-9	7	17
α-helix	10-28	19
β-strand	30	1	18
β-strand	35	1	19
β-strand	36	1	18
α-helix	42-45	4
α-helix	47-49	3
β-strand	51-56	4	19
β-strand	60-63	4	19
β-strand	65-69	5	17
α-helix	72-80	9
α-helix	89-91	3
β-strand	92-94	3	17
α-helix	103-107	5
α-helix	110-127	18
β-strand	132-140	9	17
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	17
β-strand	178	1	20
α-helix	183-197	15
β-strand	200-205	6	17
α-helix	206-211	6
α-helix	212-216	5
β-strand	223	1	21
α-helix	224-243	20
α-helix	252-259	8
β-strand	267-268	2	17
β-strand	269-273	5	22
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	22
α-helix	307-309	3
β-strand	312-321	10	22
α-helix	325-338	14
α-helix	340-342	3
β-strand	343	1	22
β-strand	351-356	6	22
α-helix	359-360	2
β-strand	373-381	9	22
α-helix	382-384	3
α-helix	385-399	15
α-helix	406-409	4
α-helix	416-437	22

Chain U: 15 helices, 0 β-strands

Element	Residues	Length
α-helix	16-21	6
α-helix	22-24	3
α-helix	28-41	14
α-helix	44-46	3
α-helix	47-53	7
α-helix	59-72	14
α-helix	75-77	3
α-helix	78-84	7
α-helix	90-102	13
α-helix	109-115	7
α-helix	121-132	12
α-helix	137-139	3
α-helix	140-145	6
α-helix	155-162	8
α-helix	171-174	4

1 more chain groups are not listed. Open the entry in the viewer and use the sequence panel to see them.

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Tubulin alpha chain	A, R	protein	451	Ovis aries	A0A836D7T3 (AlphaFold model)
Tubulin beta chain	B, S	protein	445	Ovis aries	D0VWY9 (AlphaFold model)
IE5 alpharep	C, D, T, U	protein	232	synthetic construct
Centromere protein J	P, V	protein	75	Homo sapiens	Q569I1 (AlphaFold model)

Sequence of entity 1 (A, R), FASTA

>7Q1F_1 Tubulin alpha chain (chains A, R)
MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGK
HVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLD
RIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTA
VVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITA
SLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPAN
QMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPP
TVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSE
AREDMAALEKDYEEVGVDSVEGEGEEEGEEY

Sequence of entity 2 (B, S), FASTA

>7Q1F_2 Tubulin beta chain (chains B, S)
MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEATGNKYV
PRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVV
RKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVMPSPKVSDTVV
EPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCL
RFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDSKNMM
AACDPRHGRYLTVAAIFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRG
LKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVS
EYQQYQDATADEQGEFEEEEGEDEA

Sequence of entity 3 (C, D, T, U), FASTA

>7Q1F_3 IE5 ALPHAREP (chains C, D, T, U)
MRGSHHHHHHTDPEKVEMYIKNLQDDSTLVRSIAAAALGKIGDERAVEPLIKALKDEDSR
VRAQAAGALGQIGDERAVEPLIKALKDEDPSVRYRAAEALGKIGDERAVEPLIKALKDED
TTVRRIAATALGKIGDERAVEPLIKALKDEDAAVRLTAARALGEIGDERAVEPLIKALKD
EDAYVRRAAAQALGKIGGERVRAAMEKLAETGTGFARKVAVNYLETHKSLIS

Sequence of entity 4 (P, V), FASTA

>7Q1F_4 Centromere protein J (chains P, V)
MVNIEERPIKAAIGERKQTFEDYLEEQIQLEEQELKQKQLKEGGGGGKPKQPFLKRGEGL
ARFTNAKSKFQKGKE

Ligands and cofactors

ID	Name	Formula	Copies
GTP	Guanosine-5'-triphosphate	C10 H16 N5 O14 P3	2
MG	Magnesium ion	Mg	2
GDP	Guanosine-5'-diphosphate	C10 H15 N5 O11 P2	2
FLC	Citrate anion	C6 H5 O7	1

Water and common crystallization additives (SO4, MES) are not listed.

Primary citation

Structural convergence for tubulin binding of CPAP and vinca domain microtubule inhibitors. Campanacci, V., Urvoas, A., Ammar Khodja, L. et al. Proc Natl Acad Sci U S A (2022) 119:e2120098119-e2120098119. DOI 10.1073/pnas.2120098119 · PubMed

Other PDB entries of the same protein (UniProt A0A836D7T3 (AlphaFold model), which also has an AlphaFold model), best resolution first:

6TH4 2.12 Å, Tubulin-inhibitor complex
4LNU 2.19 Å, Nucleotide-free kinesin motor domain in complex with tubulin and a DARPin
7Z0F 2.4 Å, Cpap:s-TUBULIN:IIH5 alpharep complex
8CGZ 2.53 Å, tubulin-AB8939 complex
7Q1E 2.7 Å, CPAP:TUBULIN:IIH5 alpharep complex
7Z0G 3.49 Å, CPAP:TUBULIN:IE5 alpharep complex P1 space group

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