Structure of PDB 6s6x Chain A

Receptor sequence

>6s6xA (length=1472) Species: 192 (Azospirillum brasilense)

CGVGFIAAIDGKPRRSVVEKGIEALKAVWHRGAVDADGKTGDGAGIHVAV
PQKFFKDHVKVIGHRAPDNKLAVGQVFLPRISLDAQEACRCIVETEILAF
GYYIYGWRQVPINVDIIGEKANATRPEIEQIIVGNNKGVSDEQFELDLYI
IRRRIEKAVKGEQINDFYICSLSARSIIYKGMFLAEQLTTFYPDLLDERF
ESDFAIYHQRYSTNTFPTWPLAQPFRMLAHNGEINTVKGNVNWMKAHETR
MEHPAFGTHMQDLKPVIGVGLSDSGSLDTVFEVMVRAGRTAPMVKMMLVP
QALTSSQTTPDNHKALIQYCNSVMEPWDGPAALAMTDGRWVVGGMDRNGL
RPMRYTITTDGLIIGGSETGMVKIDETQVIEKGRLGPGEMIAVDLQSGKL
YRDRELKDHLATLKPWDKWVQNTTHLDELVKTASLKGEPSDMDKAELRRR
QQAFGLTMEDMELILHPMVEDGKEAIGSMGDDSPIAVLSDKYRGLHHFFR
QNFSQVTNPPIDSLRERRVMSLKTRLGNLGNILDEDETQTRLLQLESPVL
TTAEFRAMRDYMGDTAAEIDATFPVDGGPEALRDALRRIRQETEDAVRGG
ATHVILTDEAMGPARAAIPAILATGAVHTHLIRSNLRTFTSLNVRTAEGL
DTHYFAVLIGVGATTVNAYLAQEAIAERHRRGLFGSMPLEKGMANYKKAI
DDGLLKIMSKMGISVISSYRGGGNFEAIGLSRALVAEHFPAMVSRISGIG
LNGIQKKVLEQHATAYNEEVVALPVGGFYRFRKSGDRHGWEGGVIHTLQQ
AVTNDSYTTFKKYSEQVNKRPPMQLRDLLELRSTKAPVPVDEVESITAIR
KRFITPGMSMGALSPEAHGTLNVAMNRIGAKSDSGEGGEDPARFRPDKNG
DNWNSAIKQVASGRFGVTAEYLNQCRELEIKVAQGAKPGEGGQLPGFKVT
EMIARLRHSTPGVMLISPPPHHDIYSIEDLAQLIYDLKQINPDAKVTVKL
VSRSGIGTIAAGVAKANADIILISGNSGGTGASPQTSIKFAGLPWEMGLS
EVHQVLTLNRLRHRVRLRTDGGLKTGRDIVIAAMLGAEEFGIGTASLIAM
GCIMVRQCHSNTCPVGVCVQDDKLRQKFVGTPEKVVNLFTFLAEEVREIL
AGLGFRSLNEVIGRTDLLHQVSRGAEHLDDLDLNPRLAQVDPGENARYCT
LQGRNEVPDTLDARIVADARPLFEEGEKMQLAYNARNTQRAIGTRLSSMV
TRKFGMFGLQPGHITIRLRGTAGQSLGAFAVQGIKLEVMGDANDYVGKGL
SGGTIVVRPTTSSPLETNKNTIIGNTVLYGATAGKLFAAGQAGERFAVRN
SGATVVVEGCGSNGCEYMTGGTAVILGRVGDNFAAGMTGGMAYVYDLDDS
LPLYINDESVIFQRIEVGHYESQLKHLIEEHVTETQSRFAAEILNDWARE
VTKFWQVVPKEMLNRLEVPVHL

3D structure

• PDB: 6s6x Cryo-EM Structures of Azospirillum brasilense Glutamate Synthase in Its Oligomeric Assemblies.
• Chain: A
• Resolution: 3.5 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): C1 R31 Y211 N231 G232 M479 E886 Q934 K937 Q943
• Catalytic site (residue number reindexed from 1): C1 R31 Y211 N231 G232 M479 E886 Q934 K937 Q943
• Enzyme Commision number: 1.4.1.13: glutamate synthase (NADPH).

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	FMN	A	P856 G857 M858 E886 K999 G1029 T1030 G1071 G1072 I1092 G1093 T1094	P856 G857 M858 E886 K999 G1029 T1030 G1071 G1072 I1092 G1093 T1094
BS02	F3S	A	C1102 I1103 M1104 V1105 R1106 Q1107 C1108 C1113	C1102 I1103 M1104 V1105 R1106 Q1107 C1108 C1113

Gene Ontology

Molecular Function

• GO:0004355 glutamate synthase (NADPH) activity
• GO:0015930 glutamate synthase activity
• GO:0016491 oxidoreductase activity
• GO:0016638 oxidoreductase activity, acting on the CH-NH2 group of donors
• GO:0046872 metal ion binding
• GO:0051538 3 iron, 4 sulfur cluster binding

Biological Process

• GO:0006537 glutamate biosynthetic process
• GO:0006541 glutamine metabolic process
• GO:0019676 ammonia assimilation cycle
• GO:0097054 L-glutamate biosynthetic process

External links

• PDB: RCSB:6s6x, PDBe:6s6x, PDBj:6s6x
• PDBsum: 6s6x
• PubMed: 31473159
• UniProt: Q05755|GLTB_AZOBR Glutamate synthase [NADPH] large chain (Gene Name=gltB)