7NBG

Crystal structure of human serine racemase in complex with DSiP fragment Z52314092, XChem fragment screen.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.182 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Tyrosine 121 moves revealing a ligandable pocket that couples catalysis to ATP-binding in serine racemase.

Koulouris, C.R.Gardiner, S.E.Harris, T.K.Elvers, K.T.Mark Roe, S.Gillespie, J.A.Ward, S.E.Grubisha, O.Nicholls, R.A.Atack, J.R.Bax, B.D.

(2022) Commun Biol 5: 346-346

  • DOI: https://doi.org/10.1038/s42003-022-03264-5
  • Primary Citation of Related Structures:  
    6ZSP, 6ZUJ, 7NBC, 7NBD, 7NBF, 7NBG, 7NBH

  • PubMed Abstract: 

    Human serine racemase (hSR) catalyses racemisation of L-serine to D-serine, the latter of which is a co-agonist of the NMDA subtype of glutamate receptors that are important in synaptic plasticity, learning and memory. In a 'closed' hSR structure containing the allosteric activator ATP, the inhibitor malonate is enclosed between the large and small domains while ATP is distal to the active site, residing at the dimer interface with the Tyr121 hydroxyl group contacting the α-phosphate of ATP. In contrast, in 'open' hSR structures, Tyr121 sits in the core of the small domain with its hydroxyl contacting the key catalytic residue Ser84. The ability to regulate SR activity by flipping Tyr121 from the core of the small domain to the dimer interface appears to have evolved in animals with a CNS. Multiple X-ray crystallographic enzyme-fragment structures show Tyr121 flipped out of its pocket in the core of the small domain. Data suggest that this ligandable pocket could be targeted by molecules that inhibit enzyme activity.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Ave, CB2 0QH, Cambridge, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine racemaseA [auth AAA],
B [auth BBB],
C [auth CCC],
D [auth DDD]
346Homo sapiensMutation(s): 2 
Gene Names: SRR
EC: 5.1.1.18 (PDB Primary Data), 4.3.1.18 (PDB Primary Data), 4.3.1.17 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9GZT4 (Homo sapiens)
Explore Q9GZT4 
Go to UniProtKB:  Q9GZT4
GTEx:  ENSG00000167720 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GZT4
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 10 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PLP
Query on PLP

Download Ideal Coordinates CCD File 
E [auth AAA],
KA [auth DDD],
S [auth BBB],
Z [auth CCC]
PYRIDOXAL-5'-PHOSPHATE
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N
U78 (Subject of Investigation/LOI)
Query on U78

Download Ideal Coordinates CCD File 
P [auth AAA],
X [auth BBB]
~{N}-[2-(2-methylphenyl)ethyl]ethanamide
C11 H15 N O
OAMCTZZCYXDSLI-UHFFFAOYSA-N
PGE
Query on PGE

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SA [auth DDD]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
PG0
Query on PG0

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NA [auth DDD]2-(2-METHOXYETHOXY)ETHANOL
C5 H12 O3
SBASXUCJHJRPEV-UHFFFAOYSA-N
OXE
Query on OXE

Download Ideal Coordinates CCD File 
TA [auth DDD]ORTHO-XYLENE
C8 H10
CTQNGGLPUBDAKN-UHFFFAOYSA-N
GOL
Query on GOL

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AA [auth CCC]
FA [auth CCC]
HA [auth CCC]
N [auth AAA]
Q [auth AAA]
AA [auth CCC],
FA [auth CCC],
HA [auth CCC],
N [auth AAA],
Q [auth AAA],
UA [auth DDD]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO
Query on EDO

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CA [auth CCC]
DA [auth CCC]
EA [auth CCC]
F [auth AAA]
GA [auth CCC]
CA [auth CCC],
DA [auth CCC],
EA [auth CCC],
F [auth AAA],
GA [auth CCC],
J [auth AAA],
K [auth AAA],
L [auth AAA],
M [auth AAA],
OA [auth DDD],
PA [auth DDD],
QA [auth DDD],
RA [auth DDD],
T [auth BBB]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
CA
Query on CA

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BA [auth CCC],
H [auth AAA],
MA [auth DDD],
U [auth BBB]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
MG
Query on MG

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VA [auth DDD],
Y [auth BBB]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
NA
Query on NA

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G [auth AAA]
I [auth AAA]
IA [auth CCC]
JA [auth CCC]
LA [auth DDD]
G [auth AAA],
I [auth AAA],
IA [auth CCC],
JA [auth CCC],
LA [auth DDD],
O [auth AAA],
R [auth AAA],
V [auth BBB],
W [auth BBB]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.11α = 90
b = 154.76β = 98.14
c = 85.4γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DIALSdata reduction
Aimlessdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (MRC, United Kingdom)United Kingdom--

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-03
    Type: Initial release
  • Version 1.1: 2022-04-27
    Changes: Advisory, Database references
  • Version 1.2: 2022-05-04
    Changes: Structure summary
  • Version 1.3: 2024-01-31
    Changes: Data collection, Database references, Derived calculations, Refinement description