4N8X

The structure of Nostoc sp. PCC 7120 CcmL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Interactions and structural variability of beta-carboxysomal shell protein CcmL.

Keeling, T.J.Samborska, B.Demers, R.W.Kimber, M.S.

(2014) Photosynth.Res. 121: 125-133

  • DOI: 10.1007/s11120-014-9973-z
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CcmL is a small, pentameric protein that is argued to fill the vertices of β-carboxysomal shell. Here we report the structures of two CcmL orthologs, those from Nostoc sp. PCC 7120 and Thermosynechococcus elongatus BP-1. These structures broadly rese ...

    CcmL is a small, pentameric protein that is argued to fill the vertices of β-carboxysomal shell. Here we report the structures of two CcmL orthologs, those from Nostoc sp. PCC 7120 and Thermosynechococcus elongatus BP-1. These structures broadly resemble those previously reported for other strains. However, the Nostoc CcmL structure shows an interesting pattern of behavior where two loops that map to the base of the pentamer adopt either an out or in conformation, with a consistent (over six pentamers) out-in-out-in-in pattern of protomers. The pentamers in this structure are also consistently organized into a back-to-back decamer, though evidence suggests that this is likely not present in solution. Förster resonance energy transfer experiments were able to show a weak interaction between CcmL and CcmK2 when CcmK2 was present at >100 μM. Since CcmK2 forms defined bodies with approximately 200 nm diameter at this concentration, this would support the idea that CcmL can only interact with CcmK2 at rare defect points in the growing shell.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbon dioxide concentrating mechanism protein
1, 2, 3, 4, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
109Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)Mutation(s): 0 
Gene Names: ccmL
Find proteins for Q8YYI2 (Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576))
Go to UniProtKB:  Q8YYI2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 117.880α = 90.00
b = 128.120β = 90.00
c = 220.500γ = 90.00
Software Package:
Software NamePurpose
MxDCdata collection
PHASERphasing
XDSdata reduction
PHENIXrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2014-07-16
    Type: Database references