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- PDB-7sgs: Cryo-EM structure of full-length MAP7 bound to the microtubule -

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Basic information

Entry
Database: PDB / ID: 7sgs
TitleCryo-EM structure of full-length MAP7 bound to the microtubule
Components
  • Ensconsin
  • Tubulin alpha-1B chain
  • Tubulin beta chain
KeywordsSTRUCTURAL PROTEIN / microtubule / microtubule-associated protein / cytoskeleton
Function / homology
Function and homology information


Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Hedgehog 'off' state / Cilium Assembly / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Hedgehog 'off' state / Cilium Assembly / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling / The role of GTSE1 in G2/M progression after G2 checkpoint / Aggrephagy / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Separation of Sister Chromatids / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / Recruitment of NuMA to mitotic centrosomes / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / MHC class II antigen presentation / microtubule associated complex / COPI-mediated anterograde transport / response to osmotic stress / establishment or maintenance of cell polarity / protein localization to plasma membrane / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / structural constituent of cytoskeleton / microtubule cytoskeleton organization / microtubule cytoskeleton / mitotic cell cycle / basolateral plasma membrane / microtubule / axon / signaling receptor binding / GTPase activity / GTP binding / structural molecule activity / perinuclear region of cytoplasm / metal ion binding / cytoplasm / cytosol
Similarity search - Function
Microtubule-associated protein 7 family / MAP7 (E-MAP-115) family / Tubulin-beta mRNA autoregulation signal. / Alpha tubulin / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site ...Microtubule-associated protein 7 family / MAP7 (E-MAP-115) family / Tubulin-beta mRNA autoregulation signal. / Alpha tubulin / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain / Tubulin/FtsZ-like, C-terminal domain / Tubulin/FtsZ, C-terminal / Tubulin/FtsZ, 2-layer sandwich domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ, GTPase domain / Tubulin/FtsZ, GTPase domain superfamily
Similarity search - Domain/homology
GUANOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / Tubulin beta chain / Ensconsin / Tubulin alpha-1B chain
Similarity search - Component
Biological speciesSus scrofa (pig)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsFerro, L.S. / Fang, Q. / Eshun-Wilson, L. / Fernandes, J. / Jack, A. / Farrell, D.P. / Golcuk, M. / Huijben, T. / Costa, K. / Gur, M. ...Ferro, L.S. / Fang, Q. / Eshun-Wilson, L. / Fernandes, J. / Jack, A. / Farrell, D.P. / Golcuk, M. / Huijben, T. / Costa, K. / Gur, M. / DiMaio, F. / Nogales, E. / Yildiz, A.
Funding support United States, 7items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM094522 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM123655-03 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM051487 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM127018 United States
National Science Foundation (NSF, United States)MCB-1617028 United States
National Science Foundation (NSF, United States)MCB-1055017 United States
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Science / Year: 2022
Title: Structural and functional insight into regulation of kinesin-1 by microtubule-associated protein MAP7.
Authors: Luke S Ferro / Qianglin Fang / Lisa Eshun-Wilson / Jonathan Fernandes / Amanda Jack / Daniel P Farrell / Mert Golcuk / Teun Huijben / Katelyn Costa / Mert Gur / Frank DiMaio / Eva Nogales / Ahmet Yildiz /
Abstract: Microtubule (MT)-associated protein 7 (MAP7) is a required cofactor for kinesin-1-driven transport of intracellular cargoes. Using cryo-electron microscopy and single-molecule imaging, we ...Microtubule (MT)-associated protein 7 (MAP7) is a required cofactor for kinesin-1-driven transport of intracellular cargoes. Using cryo-electron microscopy and single-molecule imaging, we investigated how MAP7 binds MTs and facilitates kinesin-1 motility. The MT-binding domain (MTBD) of MAP7 bound MTs as an extended α helix between the protofilament ridge and the site of lateral contact. Unexpectedly, the MTBD partially overlapped with the binding site of kinesin-1 and inhibited its motility. However, by tethering kinesin-1 to the MT, the projection domain of MAP7 prevented dissociation of the motor and facilitated its binding to available neighboring sites. The inhibitory effect of the MTBD dominated as MTs became saturated with MAP7. Our results reveal biphasic regulation of kinesin-1 by MAP7 in the context of their competitive binding to MTs.
History
DepositionOct 7, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 18, 2022Provider: repository / Type: Initial release
Revision 1.1Nov 30, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Jun 5, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
B: Tubulin alpha-1B chain
C: Tubulin beta chain
D: Tubulin alpha-1B chain
A: Ensconsin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)236,0629
Polymers234,5244
Non-polymers1,5385
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 3 types, 4 molecules BDCA

#1: Protein Tubulin alpha-1B chain / Alpha-tubulin ubiquitous / Tubulin K-alpha-1 / Tubulin alpha-ubiquitous chain


Mass: 50204.445 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Sus scrofa (pig) / Gene: TUBA1B / Production host: Escherichia coli (E. coli) / References: UniProt: Q2XVP4
#2: Protein Tubulin beta chain / Beta-tubulin


Mass: 49907.770 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Sus scrofa (pig) / Production host: Escherichia coli (E. coli) / References: UniProt: P02554
#3: Protein Ensconsin / Epithelial microtubule-associated protein of 115 kDa / E-MAP-115 / Microtubule-associated protein 7 / MAP-7


Mass: 84207.195 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MAP7 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q14244

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Non-polymers , 3 types, 5 molecules

#4: Chemical ChemComp-GTP / GUANOSINE-5'-TRIPHOSPHATE


Mass: 523.180 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O14P3 / Comment: GTP, energy-carrying molecule*YM
#5: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#6: Chemical ChemComp-GDP / GUANOSINE-5'-DIPHOSPHATE


Type: RNA linking / Mass: 443.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O11P2 / Comment: GDP, energy-carrying molecule*YM

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Ternary complex of alpha-beta tubulin with microtubule-assosiated protein 7
Type: COMPLEX / Entity ID: #1-#3 / Source: MULTIPLE SOURCES
Source (natural)Organism: Sus scrofa (pig)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 99219 / Symmetry type: POINT

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