Annotations: 1M3S

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1m3sa1	Alpha and beta proteins (a/b)	SIS domain	SIS domain	mono-SIS domain	Hypothetical protein YckF	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
A	d1m3sa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
B	d1m3sb1	Alpha and beta proteins (a/b)	SIS domain	SIS domain	mono-SIS domain	Hypothetical protein YckF	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
B	d1m3sb2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SIS domain/Ribosomal protein S2-like	8043269	3001397	SCOP2B (2022-06-29)
B	SCOP2 Family	mono-SIS domain	8030890	4003354	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	SIS domain/Ribosomal protein S2-like	8043269	3001397	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	SIS	e1m3sA1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: SIS	ECOD (1.6)
B	SIS	e1m3sB1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: SIS	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.10490	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glucose-6-phosphate isomerase like protein	CATH (4.3.0)
B	3.40.50.10490	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glucose-6-phosphate isomerase like protein	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01380	SIS domain (SIS)	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 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Hypothetical protein yckf	hexulose-6-phosphate isomerase activity isomerase activity catalytic activity binding carbohydrate derivative binding	formaldehyde assimilation via ribulose monophosphate cycle small molecule metabolic process metabolic process cellular process formaldehyde metabolic process aldehyde metabolic process formaldehyde assimilation response to stimulus response to chemical response to toxic substance carbohydrate derivative metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR046348	SIS domain superfamily	Homologous Superfamily
A, B	IPR017552	3-hexulose-6-phosphate isomerase	Family
A, B	IPR001347	SIS domain	Domain

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

Chains	Enzyme Name	Description	Catalytic 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] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 5.3.1.27 (UniProt) Search M-CSA Motif + EC 5.3.1.27

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.