Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1m3sa1 Alpha and beta proteins (a/b) SIS domain SIS domain mono-SIS domain Hypothetical protein YckF (Bacillus subtilis ) [TaxId: 1423 ], SCOPe (2.08)
Ad1m3sa2 Artifacts Tags Tags Tags N-terminal Tags (Bacillus subtilis ) [TaxId: 1423 ], SCOPe (2.08)
Bd1m3sb1 Alpha and beta proteins (a/b) SIS domain SIS domain mono-SIS domain Hypothetical protein YckF (Bacillus subtilis ) [TaxId: 1423 ], SCOPe (2.08)
Bd1m3sb2 Artifacts Tags Tags Tags N-terminal Tags (Bacillus subtilis ) [TaxId: 1423 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilySIS domain/Ribosomal protein S2-like8043269 3001397 SCOP2B (2022-06-29)
BSCOP2 Familymono-SIS domain8030890 4003354 SCOP2 (2022-06-29)
BSCOP2 SuperfamilySIS domain/Ribosomal protein S2-like8043269 3001397 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APF01380e1m3sA1 A: a/b three-layered sandwichesX: Flavodoxin-likeH: Ribosomal protein S2/SIS domain (From Topology)T: Ribosomal protein S2/SIS domainF: PF01380ECOD (1.6)
BPF01380e1m3sB1 A: a/b three-layered sandwichesX: Flavodoxin-likeH: Ribosomal protein S2/SIS domain (From Topology)T: Ribosomal protein S2/SIS domainF: PF01380ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.50.10490 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Glucose-6-phosphate isomerase like proteinCATH (4.3.0)
B3.40.50.10490 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Glucose-6-phosphate isomerase like proteinCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01380SIS domain (SIS)SIS domainSIS (Sugar ISomerase) domains are found in many phosphosugar isomerases and phosphosugar binding proteins. SIS domains are also found in proteins that regulate the expression of genes involved in synthesis of phosphosugars. Presumably the SIS domain ...SIS (Sugar ISomerase) domains are found in many phosphosugar isomerases and phosphosugar binding proteins. SIS domains are also found in proteins that regulate the expression of genes involved in synthesis of phosphosugars. Presumably the SIS domains bind to the end-product of the pathway.
Domain

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR046348SIS domain superfamilyHomologous Superfamily
A, B
IPR0175523-hexulose-6-phosphate isomeraseFamily
A, B
IPR001347SIS domainDomain

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
3-hexulose-6-phosphate isomerase  M-CSA #948

3-hexulose-6-phosphate (PHI) catalyses the isomerisation between 3-hexulose 6-phosphate and fructose 6-phosphate. PHI is part of the ribulose monophosphate (RuMP) pathway, which in one direction removes the toxic metabolite formaldehyde by assimilation into fructose-6-phosphate [PMID:10648518]. In the other direction, in species lacking a complete pentose phosphate pathway, the RuMP pathway yields ribulose-5-phosphate, necessary for nucleotide biosynthesis, at the cost of also yielding formaldehyde. These latter species tend usually have a formaldehyde-activating enzyme to attach formaldehyde to the C1 carrier tetrahydromethanopterin.

Defined by 7 residues: ARG:A-58 [auth A-57]HIS:A-61 [auth A-60]ASP:A-161 [auth A-160]ARG:B_2-47 [auth B_2-46]SER:B_2-89 [auth B_2-88]SER:B_2-150 [auth B_2-149]GLU:B_2-153 [auth B_2-152]
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