5XN9

Crystal structure of a secretary abundant heat soluble (SAHS) protein from Ramazzottius varieornatus (from monomer sample)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.146 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural insights into a secretory abundant heat-soluble protein from an anhydrobiotic tardigrade, Ramazzottius varieornatus

Fukuda, Y.Miura, Y.Mizohata, E.Inoue, T.

(2017) FEBS Lett 591: 2458-2469

  • DOI: https://doi.org/10.1002/1873-3468.12752
  • Primary Citation of Related Structures:  
    5XN9, 5XNA

  • PubMed Abstract: 

    Upon stopping metabolic processes, some tardigrades can undergo anhydrobiosis. Secretory abundant heat-soluble (SAHS) proteins have been reported as candidates for anhydrobiosis-related proteins in tardigrades, which seem to protect extracellular components and/or secretory organelles. We determined structures of a SAHS protein from Ramazzottius varieornatus (RvSAHS1), which is one of the toughest tardigrades. RvSAHS1 shows a β-barrel structure similar to fatty acid-binding proteins (FABPs), in which hydrophilic residues form peculiar hydrogen bond networks, which would provide RvSAHS1 with better tolerance against dehydration. We identified two putative ligand-binding sites: one that superimposes on those of some FABPs and the other, unique to and conserved in SAHS proteins. These results indicate that SAHS proteins constitute a new FABP family.


  • Organizational Affiliation

    Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SAHS1
A, B
138Ramazzottius varieornatusMutation(s): 0 
Gene Names: SAHS1RvY_02423-1RvY_02423.1RvY_02423
UniProt
Find proteins for J7MFT5 (Ramazzottius varieornatus)
Explore J7MFT5 
Go to UniProtKB:  J7MFT5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ7MFT5
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A],
N [auth B],
O [auth B],
P [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
F [auth A]
G [auth A]
H [auth A]
I [auth A]
J [auth A]
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B],
W [auth B],
X [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
ACY
Query on ACY

Download Ideal Coordinates CCD File 
L [auth A],
Y [auth B],
Z [auth B]
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A],
Q [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A],
M [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.146 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.866α = 90
b = 57.505β = 90
c = 111.723γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPSJapan16H06940
JSPSJapan17K17862

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-09-06
    Changes: Database references
  • Version 1.2: 2019-08-28
    Changes: Data collection
  • Version 1.3: 2024-03-27
    Changes: Data collection, Database references, Derived calculations