Structure of PDB 1qr6 Chain B

Receptor sequence

>1qr6B (length=551) Species: 9606 (Homo sapiens)

EKGKPLMLNPRTNKGMAFTLQERQMLGLQGLLPPKIETQDIQALRFHRNL
KKMTSPLEKYIYIMGIQERNEKLFYRILQDDIESLMPIVYTPTVGLACSQ
YGHIFRRPKGLFISISDRGHVRSIVDNWPENHVKAVVVTDGERILGLGDL
GVYGMGIPVGKLCLYTACAGIRPDRCLPVCIDVGTDNIALLKDPFYMGLY
QKRDRTQQYDDLIDEFMKAITDRYGRNTLIQFEDFGNHNAFRFLRKYREK
YCTFNDDIQGTAAVALAGLLAAQKVISKPISEHKILFLGAGEAALGIANL
IVMSMVENGLSEQEAQKKIWMFDKYGLLVKGRKAKIDSYQEPFTHSAPES
IPDTFEDAVNILKPSTIIGVAGAGRLFTPDVIRAMASINERPVIFALSNP
TAQAECTAEEAYTLTEGRCLFASGSPFGPVKLTDGRVFTPGQGNNVYIFP
GVALAVILCNTRHISDSVFLEAAKALTSQLTDEELAQGRLYPPLANIQEV
SINIAIKVTEYLYANKMAFRYPEPEDKAKYVKERTWRSEYDSLLPDVYEW
P

3D structure

• PDB: 1qr6 Crystal structure of human mitochondrial NAD(P)(+)-dependent malic enzyme: a new class of oxidative decarboxylases.
• Chain: B
• Resolution: 2.1 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): Y1112 R1165 K1183 E1255 D1256 D1278 D1279 N1421
• Catalytic site (residue number reindexed from 1): Y90 R143 K161 E233 D234 D256 D257 N399
• Enzyme Commision number: 1.1.1.38: malate dehydrogenase (oxaloacetate-decarboxylating).

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	NAD	B	R1165 N1259 T1283 G1311 A1312 G1313 E1314 A1315 D1345 K1346 V1392 A1393 A1395 L1419 S1420 N1421 G1465	R143 N237 T261 G289 A290 G291 E292 A293 D323 K324 V370 A371 A373 L397 S398 N399 G443
BS02	NAD	B	H1154 K1156 I1193 R1194 R1197 I1479 L1480 N1482 R1542 R1556	H132 K134 I171 R172 R175 I457 L458 N460 R520 R534

Gene Ontology

Molecular Function

• GO:0004470 malic enzyme activity
• GO:0004471 malate dehydrogenase (decarboxylating) (NAD+) activity
• GO:0004473 malate dehydrogenase (decarboxylating) (NADP+) activity
• GO:0008948 oxaloacetate decarboxylase activity
• GO:0009055 electron transfer activity
• GO:0016491 oxidoreductase activity
• GO:0016616 oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor
• GO:0046872 metal ion binding
• GO:0051287 NAD binding

Biological Process

• GO:0006090 pyruvate metabolic process
• GO:0006108 malate metabolic process
• GO:1902031 regulation of NADP metabolic process

Cellular Component

• GO:0005739 mitochondrion
• GO:0005759 mitochondrial matrix
• GO:0043231 intracellular membrane-bounded organelle

External links

• PDB: RCSB:1qr6, PDBe:1qr6, PDBj:1qr6
• PDBsum: 1qr6
• PubMed: 10467136
• UniProt: P23368|MAOM_HUMAN NAD-dependent malic enzyme, mitochondrial (Gene Name=ME2)