Structure of PDB 4i2b Chain A

Receptor sequence

>4i2bA (length=359) Species: 10090 (Mus musculus)

KISQYACQRRTTLNNYNQLFTDALDILAENDELRENEGSCLAFMRASSVL
KSLPFPITSMKDTEGIPCLGDKVKSIIEGIIEDGESSEAKAVLNDERYKS
FKLFTSVFGVGLKTAEKWFRMGFRTLSKIQSDKSLRFTQMQKAGFLYYED
LVSCVNRPEAEAVSMLVKEAVVTFLPDALVTMTGGFRRGKMTGHDVDFLI
TSPEATEDEEQQLLHKVTDFWKQQGLLLYCDILESTFEKFKQPSRKVDAL
DHFQKCFLILKLDHGRVHSEKQEGKGWKAIRVDLVMCPYDRRAFALLGWT
GSRQFERDLRRYATHERKMMLDNHALYDRTKRVFLEAESEEEIFAHLGLD
YIEPWERNA

3D structure

• PDB: 4i2b Structures of Intermediates along the Catalytic Cycle of Terminal Deoxynucleotidyltransferase: Dynamical Aspects of the Two-Metal Ion Mechanism.
• Chain: A
• Resolution: 2.2 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): D343 D345 D434
• Catalytic site (residue number reindexed from 1): D195 D197 D283
• Enzyme Commision number: 2.7.7.31: DNA nucleotidylexotransferase.
  3.1.11.-

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	dna	A	G257 G259 K261 T262 F405 R432	G109 G111 K113 T114 F257 R281
BS02	MG	A	D343 D345	D195 D197
BS03	APC	A	G332 G333 R336 G341 H342 D343 D345 D399 G449 W450 G452 N474	G184 G185 R188 G193 H194 D195 D197 D251 G298 W299 G301 N323
BS04	MG	A	D343 D345 D434	D195 D197 D283

Gene Ontology

Molecular Function

• GO:0003677 DNA binding
• GO:0003887 DNA-directed DNA polymerase activity
• GO:0016779 nucleotidyltransferase activity
• GO:0034061 DNA polymerase activity

Biological Process

• GO:0006281 DNA repair

External links

• PDB: RCSB:4i2b, PDBe:4i2b, PDBj:4i2b
• PDBsum: 4i2b
• PubMed: 23856622
• UniProt: P09838|TDT_MOUSE DNA nucleotidylexotransferase (Gene Name=Dntt)