Structure of PDB 5g1n Chain A

Receptor sequence

>5g1nA (length=306) Species: 9606 (Homo sapiens)

SLVGQHILSVQQFTKDQMSHLFNVAHTLRMMVQKERSLDILKGKVMASMF
YEVSTRTSSSFAAAMARLGGAVLSFSEATSSVQKGESLADSVQTMSCYAD
VVVLRHPQPGAVELAAKHCRRPVINAGDGVGEHPTQALLDIFTIREELGT
VNGMTITMVGDLKHGRTVHSLACLLTQYRVSLRYVAPPSLRMPPTVRAFV
ASRGTKQEEFESIEEALPDTDVLYMTRIQKERFGSTQEYEACFGQFILTP
HIMTRAKKKMVVMHPMPRVNEISVEVDSDPRAAYFRQAENGMYIRMALLA
TVLGRF

3D structure

• PDB: 5g1n Structure and Functional Characterization of Human Aspartate Transcarbamoylase, the Target of the Anti-Tumoral Drug Pala.
• Chain: A
• Resolution: 2.1 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): R1975 T1976 K2003 R2024 H2052 Q2055 T2145 P2184 G2210
• Catalytic site (residue number reindexed from 1): R56 T57 K84 R105 H133 Q136 T226 P265 G291
• Enzyme Commision number: 2.1.3.2: aspartate carbamoyltransferase.
  3.5.1.2: glutaminase.
  3.5.2.3: dihydroorotase.
  6.3.4.16: carbamoyl-phosphate synthase (ammonia).
  6.3.5.5: carbamoyl-phosphate synthase (glutamine-hydrolyzing).

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	PAL	A	S1973 T1974 R1975 T1976 R2024 H2052 R2085 R2146 M2185	S54 T55 R56 T57 R105 H133 R166 R227 M266	MOAD: Kd=0.017uM
BS02	PAL	A	S2000 K2003	S81 K84	MOAD: Kd=0.017uM

Gene Ontology

Molecular Function

• GO:0004070 aspartate carbamoyltransferase activity
• GO:0016597 amino acid binding
• GO:0016743 carboxyl- or carbamoyltransferase activity

Biological Process

• GO:0006207 'de novo' pyrimidine nucleobase biosynthetic process
• GO:0006520 amino acid metabolic process

External links

• PDB: RCSB:5g1n, PDBe:5g1n, PDBj:5g1n
• PDBsum: 5g1n
• PubMed: 27265852
• UniProt: P27708|PYR1_HUMAN Multifunctional protein CAD (Gene Name=CAD)