8B7B: Tubulin - maytansinoid - 6 complex

Tubulin - maytansinoid - 6 complex. Determined by X-ray diffraction at 2.25 Å resolution. Released 23 Aug 2023.

Method: X-ray diffraction
Resolution: 2.25 Å
Organisms: Bos taurus, Rattus norvegicus, Gallus gallus
Chains: 6
Atoms: 18,314
Mol. weight: 265.44 kDa
Ligands: GDP, CA, MG, GTP
Released: 23 Aug 2023

Explore 8B7B in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

8B7B contains 130 α-helices and 93 β-strands across 6 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: 26 helices, 18 β-strands

Element	Residues	Length	Sheet
β-strand	4-9	6	1
α-helix	10-28	19
β-strand	35	1	2
α-helix	49-51	3
β-strand	53-55	3	3
β-strand	60	1	2
β-strand	61-63	3	3
β-strand	65-69	5	1
α-helix	72-80	9
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	115-127	13
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	183-194	12
α-helix	195-197	3
β-strand	200-205	6	1
α-helix	206-216	11
α-helix	224-243	20
α-helix	252-259	8
β-strand	269-273	5	4
β-strand	277	1	5
α-helix	288-293	6
α-helix	294-296	3
α-helix	298-300	3
β-strand	301	1	4
β-strand	312-321	10	4
α-helix	325-336	12
β-strand	343	1	4
β-strand	349-356	8	4
α-helix	359-361	3
β-strand	368	1	5
α-helix	369-370	2
β-strand	373-381	9	4
α-helix	382-384	3
α-helix	385-399	15
α-helix	405-409	5
α-helix	415-436	22

Chain B: 28 helices, 19 β-strands

Element	Residues	Length	Sheet
β-strand	2-9	8	6
α-helix	10-27	18
β-strand	30	1	7
β-strand	36	1	7
α-helix	41-45	3
α-helix	49-51	3
β-strand	53-55	3	8
α-helix	57-59	3
β-strand	61-63	3	8
β-strand	65-69	5	6
α-helix	73-79	7
α-helix	84-86	3
α-helix	89-91	3
β-strand	92-94	3	6
α-helix	103-107	5
α-helix	110-127	18
β-strand	131-140	10	6
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	6
α-helix	173	1
β-strand	174	1	9
β-strand	177	1	9
α-helix	183-197	15
β-strand	200-205	6	6
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	6
β-strand	269-273	5	10
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	10
α-helix	307-309	3
β-strand	312-320	9	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	374-381	8	10
α-helix	382-384	3
α-helix	385-399	15
α-helix	406-409	4
α-helix	415-437	23

Chain C: 33 helices, 18 β-strands

Element	Residues	Length	Sheet
β-strand	4-9	6	11
α-helix	10-28	19
β-strand	35	1	12
α-helix	48-51	4
β-strand	53-55	3	13
β-strand	60	1	12
β-strand	61-63	3	13
β-strand	65-69	5	11
α-helix	73-79	7
α-helix	84-86	3
α-helix	89-91	3
β-strand	92-94	3	11
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	11
α-helix	144	1
α-helix	145-149	5
α-helix	150-161	12
β-strand	165-172	8	11
α-helix	183-194	12
α-helix	195-197	3
β-strand	200-205	6	11
α-helix	206-216	11
α-helix	224-243	20
α-helix	252-259	8
α-helix	268	1
β-strand	269-273	5	14
β-strand	277	1	15
α-helix	278-281	4
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	14
α-helix	307-309	3
β-strand	312-321	10	14
α-helix	325-336	12
α-helix	342	1
β-strand	343	1	14
α-helix	344	1
α-helix	350-351	2
β-strand	352-356	5	14
α-helix	359-360	2
β-strand	368	1	15
α-helix	369-370	2
β-strand	373-381	9	14
α-helix	382-384	3
α-helix	385-399	15
α-helix	405-409	5
α-helix	415-436	22
α-helix	438-439	2

Chain D: 26 helices, 17 β-strands

Element	Residues	Length	Sheet
β-strand	2-9	8	16
α-helix	10-27	18
β-strand	30	1	17
β-strand	36	1	17
α-helix	41-45	3
α-helix	49-51	3
β-strand	53-56	4	18
α-helix	57-59	3
β-strand	60-63	4	18
β-strand	65-69	5	16
α-helix	73-80	8
α-helix	89-91	3
β-strand	92-94	3	16
α-helix	103-107	5
α-helix	110-127	18
β-strand	131-140	10	16
α-helix	145-149	5
α-helix	150-160	11
β-strand	165-172	8	16
α-helix	183-197	15
β-strand	200-205	6	16
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	16
β-strand	269-273	5	19
α-helix	288-295	8
α-helix	298-300	3
β-strand	301	1	19
α-helix	307-309	3
β-strand	312-321	10	19
α-helix	325-338	14
α-helix	340-342	3
β-strand	343	1	19
β-strand	351-356	6	19
α-helix	359-360	2
β-strand	373-381	9	19
α-helix	382-384	3
α-helix	385-400	16
α-helix	406-409	4
α-helix	415-437	23

Chain E: 1 helix, 2 β-strands

Element	Residues	Length	Sheet
β-strand	7-14	8	4
β-strand	17-25	9	4
α-helix	47-141	95

Chain F: 16 helices, 19 β-strands

Element	Residues	Length	Sheet
β-strand	2-6	5	20
α-helix	12-22	11
β-strand	27-29	3	20
β-strand	39-41	3	20
α-helix	49-51	3
β-strand	61-62	2	20
α-helix	68-70	3
α-helix	74-83	10
β-strand	97-99	3	21
α-helix	128-141	14
β-strand	147-150	4	21
β-strand	163	1	21
α-helix	166-173	8
β-strand	181-184	4	21
β-strand	189	1	22
β-strand	192	1	23
β-strand	197-207	11	23
β-strand	213-216	4	23
β-strand	220-227	8	23
α-helix	243-248	6
α-helix	258-260	3
β-strand	261-263	3	23
α-helix	264-270	7
α-helix	271-275	5
α-helix	279	1
α-helix	280-284	5
α-helix	285-302	18
β-strand	310-311	2	20
β-strand	313-321	9	23
β-strand	322	1	22
β-strand	327-333	7	23
α-helix	340-342	3
α-helix	343-349	7
α-helix	350-355	6
β-strand	375-378	4	23

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Tubulin alpha-1B chain	A, C	protein	451	Bos taurus	P81947 (AlphaFold model)
Tubulin beta-2B chain	B, D	protein	445	Bos taurus	Q6B856 (AlphaFold model)
Stathmin-4	E	protein	143	Rattus norvegicus	P63043 (AlphaFold model)
Tubulin tyrosine ligase	F	protein	384	Gallus gallus	A0A8V0Z8P0 (AlphaFold model)

Sequence of entity 1 (A, C), FASTA

>8B7B_1 Tubulin alpha-1B chain (chains A, C)
MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGK
HVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLD
RIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTA
VVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITA
SLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPAN
QMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPP
TVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSE
AREDMAALEKDYEEVGVDSVEGEGEEEGEEY

Sequence of entity 2 (B, D), FASTA

>8B7B_2 Tubulin beta-2B chain (chains B, D)
MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEATGNKYV
PRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVV
RKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVMPSPKVSDTVV
EPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCL
RFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDSKNMM
AACDPRHGRYLTVAAIFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRG
LKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVS
EYQQYQDATADEQGEFEEEEGEDEA

Sequence of entity 3 (E), FASTA

>8B7B_3 Stathmin-4 (chains E)
MADMEVIELNKCTSGQSFEVILKPPSFDGVPEFNASLPRRRDPSLEEIQKKLEAAEERRK
YQEAELLKHLAEKREHEREVIQKAIEENNNFIKMAKEKLAQKMESNKENREAHLAAMLER
LQEKDKHAEEVRKNKELKEEASR

Sequence of entity 4 (F), FASTA

>8B7B_4 Tubulin tyrosine ligase (chains F)
MYTFVVRDENSSVYAEVSRLLLATGQWKRLRKDNPRFNLMLGERNRLPFGRLGHEPGLVQ
LVNYYRGADKLCRKASLVKLIKTSPELSESCTWFPESYVIYPTNLKTPVAPAQNGIRHLI
NNTRTDEREVFLAAYNRRREGREGNVWIAKSSAGAKGEGILISSEASELLDFIDEQGQVH
VIQKYLEKPLLLEPGHRKFDIRSWVLVDHLYNIYLYREGVLRTSSEPYNSANFQDKTCHL
TNHCIQKEYSKNYGRYEEGNEMFFEEFNQYLMDALNTTLENSILLQIKHIIRSCLMCIEP
AISTKHLHYQSFQLFGFDFMVDEELKVWLIEVNGAPACAQKLYAELCQGIVDVAISSVFP
LADTGQKTSQPTSIFIKLHHHHHH

Ligands and cofactors

ID	Name	Formula	Copies
GDP	Guanosine-5'-diphosphate	C10 H15 N5 O11 P2	2
CA	Calcium ion	Ca	5
MG	Magnesium ion	Mg	5
GTP	Guanosine-5'-triphosphate	C10 H16 N5 O14 P3	2
ACP	Phosphomethylphosphonic acid adenylate ester	C11 H18 N5 O12 P3	1
PX0	(~{Z})-11-[[(1~{R},2~{R},3~{S},5~{S},6~{S},16~{E},18~{E},20~{R},21~{S})-11-chlo…	C39 H53 Cl N2 O11	1

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

Primary citation

Maytansinol Functionalization: Towards Useful Probes for Studying Microtubule Dynamics. Boiarska, Z., Perez-Pena, H., Abel, A.C. et al. Chemistry (2023) 29:e202203431-e202203431. DOI 10.1002/chem.202203431 · 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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