PDBsum entry 2m02

Motor protein

PDB id: 2m02

Contents

Protein chain

71 a.a.

PDB id:

2m02

Name:

Motor protein

Title:

3d structure of cap-gly domain of mammalian dynactin determined by magic angle spinning nmr spectroscopy

Structure:

Dynactin subunit 1. Chain: a. Fragment: cap-gly domain of p150glued subunit of dynactin. Synonym: 150 kda dynein-associated polypeptide, dap-150, dp-150, p150-glued. Engineered: yes

Source:

Rattus norvegicus. Brown rat,rat,rats. Organism_taxid: 10116. Gene: dctn1. Expressed in: escherichia coli. Expression_system_taxid: 469008.

NMR struc:

10 models

Authors:

S.Yan,G.Hou,C.D.Schwieters,S.Ahmed,J.C.Williams,T.Polenova

Key ref:

S.Yan et al. (2013). Three-dimensional structure of CAP-gly domain of mammalian dynactin determined by magic angle spinning NMR spectroscopy: conformational plasticity and interactions with end-binding protein EB1. J Mol Biol, 425, 4249-4266. PubMed id: 23648839 DOI: 10.1016/j.jmb.2013.04.027

Date:

15-Oct-12 Release date: 08-May-13

Protein chain

P28023  (DCTN1_RAT) -  Dynactin subunit 1 from Rattus norvegicus

Seq: 1280 a.a.

Struc: 71 a.a.

Enzyme reactions

• Enzyme class: E.C.?

DOI no: 10.1016/j.jmb.2013.04.027

J Mol Biol 425:4249-4266 (2013)

PubMed id: 23648839

Three-dimensional structure of CAP-gly domain of mammalian dynactin determined by magic angle spinning NMR spectroscopy: conformational plasticity and interactions with end-binding protein EB1.

S.Yan, G.Hou, C.D.Schwieters, S.Ahmed, J.C.Williams, T.Polenova.

ABSTRACT

Microtubules and their associated proteins play important roles in vesicle and organelle transport, cell motility and cell division. Perturbation of these processes by mutation typically gives rise to severe pathological conditions. In our efforts to obtain atomic information on microtubule-associated protein/microtubule interactions with the goal to understand mechanisms that might potentially assist in the development of treatments for these diseases, we have determined the three-dimensional structure of CAP-Gly (cytoskeleton-associated protein, glycine-rich) domain of mammalian dynactin by magic angle spinning NMR spectroscopy. We observe two conformations in the β2 strand encompassing residues T43-V44-A45, residues that are adjacent to the disease-associated mutation, G59S. Upon binding of CAP-Gly to microtubule plus-end tracking protein EB1, the CAP-Gly shifts to a single conformer. We find extensive chemical shift perturbations in several stretches of residues of CAP-Gly upon binding to EB1, from which we define accurately the CAP-Gly/EB1 binding interface. We also observe that the loop regions may exhibit unique flexibility, especially in the GKNDG motif, which participates in the microtubule binding. This study in conjunction with our previous reports suggests that conformational plasticity is an intrinsic property of CAP-Gly likely due to its unusually high loop content and may be required for its biological functions.