Structure of PDB 5t7o Chain B

Receptor sequence

>5t7oB (length=495) Species: 353153 (Trypanosoma cruzi strain CL Brener)

SLFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGWNVPEDMKFFRDLTT
KLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQH
LLDGLPLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEA
LRPPCVHLLQAIYRTTIRASVFFRVPESGTEAAAGIEWQRETISEELTSA
NGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDTGVGTLSIFGAQ
MRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDD
NGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQI
KAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCM
LYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNH
VEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPP

3D structure

• PDB: 5t7o Crystal structure of Trypanosoma cruzi Dihydrofolate Reductase-Thymidylate Synthase in complex with (6S)-5,6,7,8-TETRAHYDROFOLATE
• Chain: B
• Resolution: 1.8 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): D48 E295 W317 Y343 C403 R423 D426
• Catalytic site (residue number reindexed from 1): D41 E276 W298 Y324 C384 R404 D407
• Enzyme Commision number: 1.5.1.3: dihydrofolate reductase.
  2.1.1.45: thymidylate synthase.

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	THG	B	V26 V27 A28 D48 M49 F52 F88 R94 Y160	V25 V26 A27 D41 M42 F45 F81 R87 Y147
BS02	UMP	B	C403 Q422 R423 S424 D426 N434 H464 Y466	C384 Q403 R404 S405 D407 N415 H445 Y447
BS03	NAP	B	V27 A28 I35 W43 G77 R78 K79 T80 S83 L99 S100 S101 T102 G130 G131 G156 S158 Y160	V26 A27 I34 W36 G70 R71 K72 T73 S76 L92 S93 S94 T95 G117 G118 G143 S145 Y147

Gene Ontology

Molecular Function

• GO:0000166 nucleotide binding
• GO:0004146 dihydrofolate reductase activity
• GO:0004799 thymidylate synthase activity
• GO:0008168 methyltransferase activity
• GO:0016491 oxidoreductase activity
• GO:0016741 transferase activity, transferring one-carbon groups

Biological Process

• GO:0006231 dTMP biosynthetic process
• GO:0006730 one-carbon metabolic process
• GO:0009165 nucleotide biosynthetic process
• GO:0032259 methylation
• GO:0046654 tetrahydrofolate biosynthetic process

Cellular Component

• GO:0005739 mitochondrion
• GO:0005829 cytosol

External links

• PDB: RCSB:5t7o, PDBe:5t7o, PDBj:5t7o
• PDBsum: 5t7o
• UniProt: Q4DLS1