Structure of PDB 1pj2 Chain A

Receptor sequence

>1pj2A (length=553) Species: 9606 (Homo sapiens)

IKEKGKPLMLNPRTNKGMAFTLQERQMLGLQGLLPPKIETQDIQALRFHR
NLKKMTSPLEKYIYIMGIQERNEKLFYRILQDDIESLMPIVYTPTVGLAC
SQYGHIFRRPKGLFISISDRGHVRSIVDNWPENHVKAVVVTDGERILGLG
DLGVYGMGIPVGKLCLYTACAGIRPDRCLPVCIDVGTDNIALLKDPFYMG
LYQKRDRTQQYDDLIDEFMKAITDRYGRNTLIQFEDFGNHNAFRFLRKYR
EKYCTFNDDIQGTAAVALAGLLAAQKVISKPISEHKILFLGAGEAALGIA
NLIVMSMVENGLSEQEAQKKIWMFDKYGLLVKGRKAKIDSYQEPFTHSAP
ESIPDTFEDAVNILKPSTIIGVAGAGRLFTPDVIRAMASINERPVIFALS
NPTAQAECTAEEAYTLTEGRCLFASGSPFGPVKLTDGRVFTPGQGNNVYI
FPGVALAVILCNTRHISDSVFLEAAKALTSQLTDEELAQGRLYPPLANIQ
EVSINIAIKVTEYLYANKMAFRYPEPEDKAKYVKERTWRSEYDSLLPDVY
EWP

3D structure

• PDB: 1pj2 Crystal structures of substrate complexes of malic enzyme and insights into the catalytic mechanism.
• Chain: A
• Resolution: 2.3 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): Y112 R165 K183 E255 D256 D278 D279 N421
• Catalytic site (residue number reindexed from 1): Y92 R145 K163 E235 D236 D258 D259 N401
• 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	LMR	A	Y112 T113 K183 D279 N421 N466 N467	Y92 T93 K163 D259 N401 N446 N447
BS02	MN	A	E255 D256 D279	E235 D236 D259
BS03	NAI	A	R165 L167 G168 N259 T283 G311 A312 G313 E314 A315 D345 K346 V392 A393 G394 A395 L419 S420 N421 G465 N466	R145 L147 G148 N239 T263 G291 A292 G293 E294 A295 D325 K326 V372 A373 G374 A375 L399 S400 N401 G445 N446
BS04	NAI	A	H154 I193 R194 R197 I479 L480 R556	H134 I173 R174 R177 I459 L460 R536
BS05	FUM	A	Q64 R67 R91	Q44 R47 R71

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:1pj2, PDBe:1pj2, PDBj:1pj2
• PDBsum: 1pj2
• PubMed: 12962632
• UniProt: P23368|MAOM_HUMAN NAD-dependent malic enzyme, mitochondrial (Gene Name=ME2)