Structure of PDB 4to1 Chain C

Receptor sequence

>4to1C (length=481) Species: 9606 (Homo sapiens)

DTMKVINDPIHGHIELHPLLVRIIDTPQFQRLRYIKQLGGGYYVFPGASH
NRFEHSLGVGYLAGCLVHALGEKQPELQISERDVLCVQIAGLCRNLGHGP
FSHMFDGRFIPLARPEVKWTHEQGSVMMFEHLINSNGIKPVMEQYGLIPE
EDICFIKEQIVGPLDSLWPYKGRPENKSFLYEIVSNKRNGIDVDKWDYFA
RDCHHLGIQNNFDYKRFIKFARVCEVDNELRICARDKEVGNLYDMFHTRN
SLHRRAYQHKVGNIIDTMITDAFLKADDYIEITGAGGKKYRISTAIDDME
AYTKLTDNIFLEILYSTDPKLKDAREILKQIEYRNLFKYVGETQPTGQIK
IKREDYESLPKEVASAKPKVLLDVKLKAEDFIVDVINMDYGMQEKNPIDH
VSFYCKTAPNRAIRITKNQVSQLLPEKFAEQLIRVYCKKVDRKSLYAARQ
YFVQWCADRNFTKPQDGDVIAPLITPQKKEW

3D structure

• PDB: 4to1 Structural basis of cellular dNTP regulation by SAMHD1.
• Chain: C
• Resolution: 2.55 Å

Enzymatic activity

• Enzyme Commision number: 3.1.5.-

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	DTP	C	V156 F157 R372 H376 K377	V44 F45 R255 H259 K260
BS02	DCP	C	R333 R352 K354 K523	R216 R235 K237 K406
BS03	GTP	C	K116 V117 I118 D137 R145	K4 V5 I6 D25 R33
BS04	DCP	C	L150 R164 R206 H210 H215 H233 D311 K312 Y315 D319 R366 Y374	L38 R52 R94 H98 H103 H121 D194 K195 Y198 D202 R249 Y257
BS05	GTP	C	Y155 V156 V378 R451	Y43 V44 V261 R334
BS06	DCP	C	V117 N119	V5 N7

External links

• PDB: RCSB:4to1, PDBe:4to1, PDBj:4to1
• PDBsum: 4to1
• PubMed: 25267621
• UniProt: Q9Y3Z3|SAMH1_HUMAN Deoxynucleoside triphosphate triphosphohydrolase SAMHD1 (Gene Name=SAMHD1)