1M5Q

Crystal structure of a novel Sm-like archaeal protein from Pyrobaculum aerophilum

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Structure and assembly of an augmented Sm-like archaeal protein 14-mer

Mura, C., Phillips, M., Kozhukhovsky, A., Eisenberg, D.

(2003) Proc Natl Acad Sci U S A 100: 4539-4544

  • DOI: https://doi.org/10.1073/pnas.0538042100
  • Primary Citation of Related Structures:  
    1M5Q

  • PubMed Abstract: 

    • To better understand the roles of Sm proteins in forming the cores of many RNA-processing ribonucleoproteins, we determined the crystal structure of an atypical Sm-like archaeal protein (SmAP3) in which the conserved Sm domain is augmented by a previously uncharacterized, mixed alpha/beta C-terminal domain ...

    To better understand the roles of Sm proteins in forming the cores of many RNA-processing ribonucleoproteins, we determined the crystal structure of an atypical Sm-like archaeal protein (SmAP3) in which the conserved Sm domain is augmented by a previously uncharacterized, mixed alpha/beta C-terminal domain. The structure reveals an unexpected SmAP3 14-mer that is perforated by a cylindrical pore and is bound to 14 cadmium (Cd(2+)) ions. Individual heptamers adopt either "apical" or "equatorial" conformations that chelate Cd(2+) differently. SmAP3 forms supraheptameric oligomers (SmAP3)(n = 7,14,28) in solution, and assembly of the asymmetric 14-mer is modulated by differential divalent cation-binding in apical and equatorial subunits. Phylogenetic and sequence analyses substantiate SmAP3s as a unique subset of SmAPs. These results distinguish SmAP3s from other Sm proteins and provide a model for the structure and properties of Sm proteins >100 residues in length, e.g., several human Sm proteins.

    Related Citations: 
    • The crystal structure of a heptameric archaeal Sm protein: Implications for the eukaryotic snRNP core
      Mura, C., Cascio, D., Sawaya, M.R., Eisenberg, D.
      (2001) Proc Natl Acad Sci U S A 98: 5532
    Organizational Affiliation: 

    Howard Hughes Medical Institute, Molecular Biology Institute, and Department of Energy Institute for Genomics and Proteomics, 201 Boyer Hall Molecular Biology Institute, University of California, Box 951570, Los Angeles, CA 90095-1570, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
small nuclear ribonucleoprotein homolog
A,
AA [auth 1],
B,
BA [auth 2],
C,
D,
E,
F,
G,
H,
I,
J,
K,
L,
M,
N,
O,
P,
Q,
R,
S,
T,
U,
V,
W,
X,
Y,
Z
130Pyrobaculum aerophilumMutation(s): 0 
Gene Names: SmAP3 gene (Pae2122)
UniProt
Find proteins for Q8ZVU2 (Pyrobaculum aerophilum (strain ATCC 51768 / DSM 7523 / JCM 9630 / CIP 104966 / NBRC 100827 / IM2))
Explore Q8ZVU2 
Go to UniProtKB:  Q8ZVU2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8ZVU2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD
Download Ideal Coordinates CCD File 
AB [auth L],
AC [auth Y],
BB [auth M],
CA [auth A],
CC [auth Z],
AB [auth L],
AC [auth Y],
BB [auth M],
CA [auth A],
CC [auth Z],
DA [auth A],
EC [auth 1],
FB [auth O],
GA [auth B],
GB [auth P],
HB [auth P],
HC [auth 2],
IA [auth D],
IB [auth Q],
JA [auth D],
JB [auth R],
KA [auth E],
LA [auth F],
MB [auth S],
OA [auth H],
OB [auth U],
PA [auth H],
PB [auth V],
TA [auth I],
TB [auth W],
WA [auth J],
XB [auth X],
YA [auth K]
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
CB [auth M],
FA [auth A],
FC [auth 1],
IC [auth 2],
LB [auth R],
CB [auth M],
FA [auth A],
FC [auth 1],
IC [auth 2],
LB [auth R],
NA [auth G],
QA [auth H],
RA [auth H],
RB [auth V],
UB [auth W],
XA [auth J],
YB [auth X]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ACY
Query on ACY
Download Ideal Coordinates CCD File 
BC [auth Y],
DB [auth M],
DC [auth Z],
EB [auth N],
GC [auth 1],
BC [auth Y],
DB [auth M],
DC [auth Z],
EB [auth N],
GC [auth 1],
JC [auth 2],
MA [auth F],
SA [auth H],
SB [auth V],
UA [auth I],
VA [auth I],
VB [auth W],
WB [auth W],
ZA [auth K],
ZB [auth X]
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
EA [auth A],
HA [auth B],
KB [auth R],
NB [auth S],
QB [auth V]		SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,
AA [auth 1],
B,
BA [auth 2],
C,
A,
AA [auth 1],
B,
BA [auth 2],
C,
D,
E,
F,
G,
H,
I,
J,
K,
L,
M,
N,
O,
P,
Q,
R,
S,
T,
U,
V,
W,
X,
Y,
Z
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.322α = 90
b = 172.427β = 90
c = 148.108γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHELXDphasing
CNSrefinement

Structure Validation

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View more in-depth experimental data
Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-03-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-05-17
    Changes: Structure summary