5ITZ: Tubulin alpha-1B chain

Crystal structure of the SAC domain of CPAP in a complex with Tubulin and Darpin. Determined by X-ray diffraction at 2.2 Å resolution. Released 1 Jun 2016.

Method: X-ray diffraction
Resolution: 2.2 Å
Organisms: Bos taurus, Homo sapiens, synthetic construct
Chains: 4
Atoms: 8,279
Mol. weight: 129.84 kDa
Ligands: LOC, GDP, MG, GTP
Released: 1 Jun 2016

Explore 5ITZ in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

5ITZ contains 66 α-helices and 33 β-strands across 4 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: 29 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	53-55	3	2
β-strand	61-63	3	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	1
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	1
α-helix	173	1
α-helix	183-195	13
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	281-282	2
α-helix	284-286	3
α-helix	288-294	7
α-helix	298-300	3
β-strand	301	1	3
β-strand	312-321	10	3
α-helix	325-338	14
β-strand	343	1	3
α-helix	350-351	2
β-strand	352-356	5	3
α-helix	359-360	2
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	416-435	20

Chain B: 27 helices, 17 β-strands

Element	Residues	Length	Sheet
β-strand	3-9	7	5
α-helix	10-28	19
β-strand	30	1	6
β-strand	36	1	6
α-helix	42-47	4
α-helix	49-52	4
β-strand	53	1	7
β-strand	63	1	7
β-strand	65-69	5	5
α-helix	73-79	7
α-helix	89-91	3
β-strand	92-94	3	5
α-helix	103-108	6
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
α-helix	173	1
α-helix	183-197	15
β-strand	200-205	6	5
α-helix	206-211	6
α-helix	212-216	5
α-helix	224-238	15
α-helix	240-243	4
α-helix	252-259	8
β-strand	267-268	2	5
β-strand	269-273	5	8
α-helix	285-287	3
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	8
α-helix	307-309	3
β-strand	312-320	9	8
α-helix	325-338	14
α-helix	340-342	3
β-strand	343	1	8
β-strand	351-356	6	8
α-helix	359-360	2
β-strand	374-381	8	8
α-helix	382-384	3
α-helix	385-400	16
α-helix	405-409	5
α-helix	416-437	22

Chain D: 2 helices, 0 β-strands

Element	Residues	Length	Sheet
α-helix	376-377	2
α-helix	380-384	5

Chain F: 8 helices, 0 β-strands

Element	Residues	Length
α-helix	14-24	11
α-helix	27-35	9
α-helix	50-56	7
α-helix	60-68	9
α-helix	83-90	8
α-helix	93-101	9
α-helix	116-122	7
α-helix	126-134	9

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Tubulin alpha-1B chain	A	protein	451	Bos taurus	P81947 (AlphaFold model)
Tubulin beta-2B chain	B	protein	445	Bos taurus	Q6B856 (AlphaFold model)
Centromere protein J	D	protein	129	Homo sapiens	Q9HC77 (AlphaFold model)
Designed ankyrin repeat protein (DARPIN) D1	F	protein	127	synthetic construct

Sequence of entity 1 (A), FASTA

>5ITZ_1 Tubulin alpha-1B chain (chains A)
MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGK
HVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLD
RIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTA
VVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITA
SLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPAN
QMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPP
TVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSE
AREDMAALEKDYEEVGVDSVEGEGEEEGEEY

Sequence of entity 2 (B), FASTA

>5ITZ_2 Tubulin beta-2B chain (chains B)
MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEATGNKYV
PRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVV
RKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVMPSPKVSDTVV
EPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCL
RFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDSKNMM
AACDPRHGRYLTVAAIFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRG
LKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVS
EYQQYQDATADEQGEFEEEEGEDEA

Sequence of entity 3 (D), FASTA

>5ITZ_3 Centromere protein J (chains D)
MAHHHHHHGSLVPRGSAQKHDDSSEVANIEERPIKAAIGERKQTFEDYLEEQIQLEEQEL
KQKQLKEAEGPLPIKAKPKQPFLKRGEGLARFTNAKSKFQKGKESKLVTNQSTSEDQPLF
KMDRQQLQR

Sequence of entity 4 (F), FASTA

>5ITZ_4 Designed ankyrin repeat protein (DARPIN) D1 (chains F)
DLGKKLLEAARAGQDDEVRILMANGADVNATDASGLTPLHLAATYGHLEIVEVLLKHGAD
VNAIDIMGSTPLHLAALIGHLEIVEVLLKHGADVNAVDTWGDTPLHLAAIMGHLEIVEVL
LKHGADV

Ligands and cofactors

ID	Name	Formula	Copies
LOC	N-[(7S)-1,2,3,10-tetramethoxy-9-oxo-6,7-dihydro-5H-benzo[d]heptalen-7-yl]ethana…	C22 H25 N O6	1
GDP	Guanosine-5'-diphosphate	C10 H15 N5 O11 P2	1
MG	Magnesium ion	Mg	1
GTP	Guanosine-5'-triphosphate	C10 H16 N5 O14 P3	1

Primary citation

Centriolar CPAP/SAS-4 Imparts Slow Processive Microtubule Growth. Sharma, A., Aher, A., Dynes, N.J. et al. Dev Cell (2016) 37:362-376. DOI 10.1016/j.devcel.2016.04.024 · PubMed

Other PDB entries of the same protein (UniProt P81947 (AlphaFold model), which also has an AlphaFold model), best resolution first:

6S8K 1.52 Å, Structure, Thermodynamics, and Kinetics of Plinabulin Binding to two Tubulin Isotypes
8QL2 1.7 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…
6ZWB 1.75 Å, Z-SBTub3 photoswitch bound to tubulin-DARPin D1 complex
4I4T 1.8 Å, Crystal structure of tubulin-RB3-TTL-Zampanolide complex
5IYZ 1.8 Å, Tubulin-MMAE complex
5NQU 1.8 Å, Tubulin Darpin cryo structure
7YZ3 1.8 Å, Molecular snapshots of drug release from tubulin: Apo state
8QEA 1.8 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…
8QL3 1.8 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…
8QL4 1.8 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…
8QL5 1.8 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…
8QL6 1.8 Å, Ultrafast structural transitions in an azobenzene photoswitch at near-atomic resolution:…

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