ftsW

UniProt ID: P0ABG4
Organism: Escherichia coli K-12
Review Status: COMPLETE
Aliases:
b0089 JW0087
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Gene Description

FtsW is a multipass inner-membrane SEDS peptidoglycan glycosyltransferase that builds septal glycan strands during Escherichia coli cell division. It works with the class-B penicillin-binding protein FtsI/PBP3, which cross-links peptide stems, in the FtsZ-organized divisome. FtsW participates directly in septum construction and shaping the daughter-cell poles. Reconstituted FtsW can also promote transbilayer movement of fluorescent lipid II analogues, although a physiological contribution of that activity remains unresolved; MurJ supplies the essential lipid II translocation step in vivo.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0000917 division septum assembly
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
ACCEPT
Summary: FtsW is a divisome protein acting at the division septum.
Reason: The annotation is appropriately septation-specific. FtsW is the SEDS peptidoglycan polymerase half of the FtsW/FtsI septal synthase, and a divisome review describes E. coli division as being mediated by the divisome.
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
GO:0005515 protein binding
IDA
PMID:14663069
Use of a two-hybrid assay to study the assembly of a complex...
REMOVE
Summary: The two-hybrid study surveyed FtsW contacts across the E. coli septosome.
Reason: The interaction evidence is credible, but GO:0005515 is an uninformative generic binding term. FtsW's core molecular activity is septal peptidoglycan glycosyltransferase activity; this row should not be kept as a stand-alone molecular-function annotation.
Supporting Evidence:
PMID:14663069
The ability of each of the nine Escherichia coli division proteins (FtsZ, FtsA, ZipA, FtsK, FtsQ, FtsL, FtsW, FtsI, FtsN) to interact with itself and with each of the remaining eight proteins was studied in 43 possible combinations of protein pairs by the two-hybrid system previously developed by the authors' group.
GO:0005515 protein binding
IPI
PMID:15774864
Interaction network among Escherichia coli membrane proteins...
REMOVE
Summary: Bacterial two-hybrid analysis supports FtsW-FtsI divisome interactions.
Reason: The FtsW-FtsI interaction is biologically important for septal peptidoglycan synthesis, but the generic protein-binding term does not state a specific activity or complex function and is less informative than the accepted septal glycosyltransferase and divisome annotations.
Supporting Evidence:
PMID:15774864
In the present study, we used a bacterial two-hybrid system based on interaction-mediated reconstitution of a cyclic AMP (cAMP) signaling cascade to unravel the molecular basis of septum assembly by analyzing the protein interaction network among E. coli cell division proteins.
GO:0005515 protein binding
IPI
PMID:15774864
Interaction network among Escherichia coli membrane proteins...
REMOVE
Summary: Bacterial two-hybrid analysis supports interactions with divisome partners.
Reason: Physical interaction with FtsI/FtsN helps place FtsW in the late divisome, but GO:0005515 is too generic to describe FtsW's molecular role.
Supporting Evidence:
PMID:15774864
In the present study, we used a bacterial two-hybrid system based on interaction-mediated reconstitution of a cyclic AMP (cAMP) signaling cascade to unravel the molecular basis of septum assembly by analyzing the protein interaction network among E. coli cell division proteins.
GO:0005515 protein binding
IPI
PMID:15774864
Interaction network among Escherichia coli membrane proteins...
REMOVE
Summary: The bacterial two-hybrid study places FtsW in a septal network.
Reason: Protein interaction evidence should be captured through the divisome and septal synthesis context, not through a generic GO:0005515 molecular function row.
Supporting Evidence:
PMID:15774864
Altogether, these data suggest that the cell division machinery assembly is driven by the cooperative association among the different Fts proteins to form a dynamic multiprotein structure at the septum site.
GO:0005515 protein binding
IPI
PMID:17185541
Three functional subdomains of the Escherichia coli FtsQ pro...
REMOVE
Summary: FtsW interaction with the divisome protein FtsQ was mapped experimentally.
Reason: The FtsQ-FtsW contact is a divisome assembly interaction. The stand-alone GO:0005515 annotation is not a useful molecular function for a septal peptidoglycan glycosyltransferase.
Supporting Evidence:
PMID:17185541
FtsQ, an essential protein for the Escherichia coli divisome assembly, is able to interact with various division proteins, namely FtsI, FtsL, FtsN, FtsB and FtsW.
GO:0005515 protein binding
IPI
PMID:18165305
The monofunctional glycosyltransferase of Escherichia coli l...
REMOVE
Summary: MtgA was reported to interact with FtsW and other divisome constituents.
Reason: This interaction may reflect divisome-associated peptidoglycan assembly, but GO:0005515 adds no mechanistic function for FtsW and is not a core molecular-function annotation.
Supporting Evidence:
PMID:18165305
is able to interact with three constituents of the divisome, PBP3, FtsW, and FtsN
GO:0005515 protein binding
IPI
PMID:20497333
Direct interactions of early and late assembling division pr...
REMOVE
Summary: FRET assays detected FtsN interactions with late divisome proteins.
Reason: FtsN-FtsW proximity is part of the septal divisome interaction network; the GO:0005515 parent term is generic and should not be retained as a molecular-function assertion.
Supporting Evidence:
PMID:20497333
Interestingly, we find FtsN, one of the latest proteins in the divisome assembly, interacting with late assembling proteins FtsI and FtsW, but also with early (proto-ring) protein ZapA.
GO:0005515 protein binding
IPI
PMID:20497333
Direct interactions of early and late assembling division pr...
REMOVE
Summary: Quantitative FRET detected an FtsW-FtsN interaction in E. coli cells.
Reason: The evidence supports a physical divisome contact, but the generic binding term does not describe FtsW's SEDS glycosyltransferase function.
Supporting Evidence:
PMID:20497333
Interestingly, we find FtsN, one of the latest proteins in the divisome assembly, interacting with late assembling proteins FtsI and FtsW, but also with early (proto-ring) protein ZapA.
GO:0005515 protein binding
IPI
PMID:20847002
The integral membrane FtsW protein and peptidoglycan synthas...
REMOVE
Summary: FtsW and PBP3/FtsI were shown to form a discrete subcomplex.
Reason: The row reports a real FtsW-FtsI contact, but GO:0005515 is a generic parent term. The same biology is better represented by FtsW's septal peptidoglycan glycosyltransferase activity in the divisome.
Supporting Evidence:
PMID:20847002
These proteins are able to form a discrete complex independently of the other cell-division proteins.
GO:0005515 protein binding
IPI
PMID:20847002
The integral membrane FtsW protein and peptidoglycan synthas...
REMOVE
Summary: The FtsW-FtsI/PBP3 subcomplex was characterized directly.
Reason: Generic protein binding is not an informative molecular function for FtsW; this interaction belongs in the structural description of the septal SEDS-bPBP pair.
Supporting Evidence:
PMID:20847002
These proteins are able to form a discrete complex independently of the other cell-division proteins.
GO:0005515 protein binding
IPI
PMID:20847002
The integral membrane FtsW protein and peptidoglycan synthas...
REMOVE
Summary: The paper resolved FtsW contacts with septal synthesis proteins.
Reason: The underlying physical interaction evidence is useful, but the GO:0005515 row should be removed because it is a generic binding annotation with no specific FtsW activity.
Supporting Evidence:
PMID:20847002
The periplasmic loop 9/10 of FtsW appeared to be involved in the interaction with both PBP1B and PBP3.
GO:0005515 protein binding
IPI
PMID:28233869
Interplay between Penicillin-binding proteins and SEDS prote...
REMOVE
Summary: FtsW, PBP3, and PBP1b were isolated as a ternary complex in vitro.
Reason: The result informs how the divisome couples SEDS and PBP enzymes, but GO:0005515 remains a generic binding term and is not the molecular activity that FtsW performs.
Supporting Evidence:
PMID:28233869
PBP1b, PBP3 and FtsW form a ternary complex in vitro
GO:0005515 protein binding
IPI
PMID:29176613
Global landscape of cell envelope protein complexes in Esche...
UNDECIDED
Summary: The full AP-MS article is accessible, but the target-specific interaction edge remains in unverified supplementary data.
Reason: The ordinary outcome for adjudicated bare protein binding would be REMOVE as uninformative. Here the precise FtsW interaction underlying PMID:29176613 could not be checked, and the article-level network description is not target-specific support. Retain uncertainty instead of claiming either a false interaction or a narrower functional activity.
GO:0005886 plasma membrane
EXP
PMID:11807049
The Escherichia coli cell division protein FtsW is required ...
ACCEPT
Summary: GFP-FtsW localizes to the E. coli septal membrane.
Reason: FtsW is a multipass cytoplasmic-membrane protein; plasma membrane is the appropriate GO cellular-component term for the E. coli inner membrane.
Supporting Evidence:
PMID:11807049
Analysis of FtsW localization confirmed and extended these results; septal localization of FtsW required FtsZ, FtsA, FtsQ, and FtsL but not FtsI.
GO:0005886 plasma membrane
EXP
PMID:12423747
Topological characterization of the essential Escherichia co...
ACCEPT
Summary: Topology analysis confirmed that FtsW is a 10-pass membrane protein.
Reason: The annotation is directly supported by membrane topology data and is consistent with FtsW's SEDS-family enzymatic role in the membrane.
Supporting Evidence:
PMID:12423747
N-terminal and C-terminal ends in the cytoplasm, 10 transmembrane segments and one large loop of 67 amino acids (E240-E306) located in the periplasm
GO:0005886 plasma membrane
EXP
PMID:9603865
FtsI and FtsW are localized to the septum in Escherichia col...
ACCEPT
Summary: FtsW was localized to the septal inner membrane during E. coli division.
Reason: Septal localization of an integral inner-membrane FtsW fusion supports plasma-membrane localization.
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0005886 plasma membrane
IBA
GO_REF:0000033
ACCEPT
Summary: Phylogenetic transfer of SEDS inner-membrane localization is correct.
Reason: The PANTHER node covers SEDS-family proteins that function as multipass cytoplasmic-membrane peptidoglycan glycosyltransferases; direct E. coli topology and localization evidence independently support the row.
Supporting Evidence:
PMID:12423747
N-terminal and C-terminal ends in the cytoplasm, 10 transmembrane segments and one large loop of 67 amino acids (E240-E306) located in the periplasm
GO:0005886 plasma membrane
IDA
PMID:15919996
Global topology analysis of the Escherichia coli inner membr...
ACCEPT
Summary: The global E. coli topology survey supports FtsW membrane localization.
Reason: FtsW has multiple experimentally and computationally supported transmembrane segments, so the directly assayed inner-membrane localization is appropriate.
Supporting Evidence:
PMID:15919996
we established the periplasmic or cytoplasmic locations of the C termini for 601 inner membrane proteins.
GO:0005886 plasma membrane
IDA
PMID:21386816
Identification of FtsW as a transporter of lipid-linked cell...
ACCEPT
Summary: FtsW was assayed as an integral cytoplasmic-membrane protein.
Reason: The membrane-vesicle and reconstitution experiments used FtsW as an integral membrane protein, in agreement with the established topology of the SEDS family.
Supporting Evidence:
PMID:21386816
the integral membrane protein FtsW, an essential protein of the bacterial division machinery, is a transporter of the lipid-linked peptidoglycan precursors across the cytoplasmic membrane.
GO:0005886 plasma membrane
IEA
GO_REF:0000120
ACCEPT
Summary: Automated UniProt/UniRule plasma-membrane localization is correct.
Reason: The IEA repeats an experimentally supported inner-membrane localization for a 10-pass SEDS membrane enzyme.
Supporting Evidence:
PMID:12423747
N-terminal and C-terminal ends in the cytoplasm, 10 transmembrane segments and one large loop of 67 amino acids (E240-E306) located in the periplasm
GO:0005886 plasma membrane
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
ACCEPT
Summary: FtsW is a membrane component of the divisome.
Reason: Although the cited review is secondary, direct topology and septal localization papers make the plasma-membrane annotation sound.
Supporting Evidence:
PMID:12423747
N-terminal and C-terminal ends in the cytoplasm, 10 transmembrane segments and one large loop of 67 amino acids (E240-E306) located in the periplasm
GO:0005886 plasma membrane
RCA
PMID:7961485
Identification of FtsW and characterization of a new ftsW di...
ACCEPT
Summary: Early FtsW characterization is consistent with inner-membrane localization.
Reason: FtsW's anomalous migration and similarity to RodA were early evidence for a membrane-associated polytopic protein, and later topology work confirmed the plasma-membrane localization.
Supporting Evidence:
PMID:7961485
The product of the ftsW gene has been identified as a polypeptide that, like the related RodA protein, shows anomalous mobility on sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
GO:0008360 regulation of cell shape
IBA
GO_REF:0000033
ACCEPT
Summary: Septal glycan synthesis by FtsW contributes to cell surface geometry during constriction.
Reason: GO:0008360 covers modulation of cell surface configuration, not only maintenance of lateral rod shape. FtsW itself polymerizes septal wall material and shapes constricting poles; this is direct morphogenetic work, not merely the filamentation phenotype of an essential-gene knockout. PMID:9006034 includes division-block and ftsW rodA double-mutant morphology, while PMID:33495624 connects FtsW inhibition to septal glycan labeling and abnormal septa/poles. This does not assign the RodA lateral-elongation role to FtsW.
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
GO:0008360 regulation of cell shape
IMP
PMID:9006034
Two polypeptide products of the Escherichia coli cell divisi...
ACCEPT
Summary: Septal glycan synthesis by FtsW contributes to cell surface geometry during constriction.
Reason: GO:0008360 covers modulation of cell surface configuration, not only maintenance of lateral rod shape. FtsW itself polymerizes septal wall material and shapes constricting poles; this is direct morphogenetic work, not merely the filamentation phenotype of an essential-gene knockout. PMID:9006034 includes division-block and ftsW rodA double-mutant morphology, while PMID:33495624 connects FtsW inhibition to septal glycan labeling and abnormal septa/poles. This does not assign the RodA lateral-elongation role to FtsW.
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
GO:0008955 peptidoglycan glycosyltransferase activity
IEA
GO_REF:0000120
ACCEPT
Summary: FtsW supplies septal peptidoglycan glycan-polymerization activity.
Reason: The direct purified-protein assays in PMID:30692671 used S. thermophilus, S. aureus and P. aeruginosa orthologs expressed in E. coli; they were not assays of E. coli FtsW. Target-specific PMID:33495624 used E. coli BW25113-derived strains, an MTSES-sensitive FtsW variant, selective inhibition of other polymerases and alkyne-NAM incorporation to assign septal polymerization to FtsW in vivo. The original PMID:27525505 SEDS discovery reinforces family chemistry but does not itself establish every FtsW ortholog. Together these lines support the target claim and direct biosynthetic participation.
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:30692671
We conclude that FtsW is a peptidoglycan polymerase that requires divalent cations and the presence of a bPBP for activity.
GO:0009252 peptidoglycan biosynthetic process
IEA
GO_REF:0000120
ACCEPT
Summary: FtsW supplies septal peptidoglycan glycan-polymerization activity.
Reason: The direct purified-protein assays in PMID:30692671 used S. thermophilus, S. aureus and P. aeruginosa orthologs expressed in E. coli; they were not assays of E. coli FtsW. Target-specific PMID:33495624 used E. coli BW25113-derived strains, an MTSES-sensitive FtsW variant, selective inhibition of other polymerases and alkyne-NAM incorporation to assign septal polymerization to FtsW in vivo. The original PMID:27525505 SEDS discovery reinforces family chemistry but does not itself establish every FtsW ortholog. Together these lines support the target claim and direct biosynthetic participation.
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:30692671
We conclude that FtsW is a peptidoglycan polymerase that requires divalent cations and the presence of a bPBP for activity.
GO:0009252 peptidoglycan biosynthetic process
RCA
PMID:27525505
SEDS proteins are a widespread family of bacterial cell wall...
ACCEPT
Summary: FtsW supplies septal peptidoglycan glycan-polymerization activity.
Reason: The direct purified-protein assays in PMID:30692671 used S. thermophilus, S. aureus and P. aeruginosa orthologs expressed in E. coli; they were not assays of E. coli FtsW. Target-specific PMID:33495624 used E. coli BW25113-derived strains, an MTSES-sensitive FtsW variant, selective inhibition of other polymerases and alkyne-NAM incorporation to assign septal polymerization to FtsW in vivo. The original PMID:27525505 SEDS discovery reinforces family chemistry but does not itself establish every FtsW ortholog. Together these lines support the target claim and direct biosynthetic participation.
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:30692671
We conclude that FtsW is a peptidoglycan polymerase that requires divalent cations and the presence of a bPBP for activity.
GO:0015648 lipid-linked peptidoglycan transporter activity
IBA
GO_REF:0000033
MARK AS OVER ANNOTATED
Summary: FtsW-mediated transport of fluorescent lipid II is demonstrated in reconstituted membranes; its native contribution remains unresolved.
Reason: Purified FtsW promoted lipid-II translocation in proteoliposomes, so the measured capacity is retained as real. However, MurJ performs the essential native flipping step, and no physiological contribution by FtsW is established. This exceeds support for a genuine secondary physiological function under the enzyme-specificity policy. The residual-FtsW caveat in the depletion study prevents a confident claim of zero in-vivo capacity; no quantitative low-efficiency comparison establishes promiscuous noise. MARK_AS_OVER_ANNOTATED therefore records uncertain physiological relevance without discarding the assay or calling it a demonstrated secondary function.
Propagation Review
Root cause: UNRESOLVED
Sources checked:
PANTHER:PTN000767103 UNRESOLVED
Frozen GOA traces this IBA to PTN000767103 with target P0ABG4 among its descendants. The target has genuine direct in-vitro flippase evidence, so its appearance is not circular. The issue is whether that measured capacity warrants a physiological transporter function given the native MurJ evidence; this review does not infer an erroneous evolutionary node placement or a lineage-specific loss without the tree evidence.
Supporting Evidence:
PMID:21386816
purified FtsW induced the transbilayer movement of Lipid II in model membranes
PMID:25013077
We found that lipid II flipping remained robust in this background (Figs. S8–S9).
PMID:25013077
Although it is possible that residual FtsW in these cells was sufficient for the observed activity, this result suggests that SEDS proteins are not responsible for lipid II flippase activity in vivo.
GO:0015648 lipid-linked peptidoglycan transporter activity
IDA
PMID:21386816
Identification of FtsW as a transporter of lipid-linked cell...
MARK AS OVER ANNOTATED
Summary: FtsW-mediated transport of fluorescent lipid II is demonstrated in reconstituted membranes; its native contribution remains unresolved.
Reason: Purified FtsW promoted lipid-II translocation in proteoliposomes, so the measured capacity is retained as real. However, MurJ performs the essential native flipping step, and no physiological contribution by FtsW is established. This exceeds support for a genuine secondary physiological function under the enzyme-specificity policy. The residual-FtsW caveat in the depletion study prevents a confident claim of zero in-vivo capacity; no quantitative low-efficiency comparison establishes promiscuous noise. MARK_AS_OVER_ANNOTATED therefore records uncertain physiological relevance without discarding the assay or calling it a demonstrated secondary function.
Supporting Evidence:
PMID:21386816
purified FtsW induced the transbilayer movement of Lipid II in model membranes
PMID:25013077
We found that lipid II flipping remained robust in this background (Figs. S8–S9).
PMID:25013077
Although it is possible that residual FtsW in these cells was sufficient for the observed activity, this result suggests that SEDS proteins are not responsible for lipid II flippase activity in vivo.
GO:0015836 lipid-linked peptidoglycan transport
IEA
GO_REF:0000108
MARK AS OVER ANNOTATED
Summary: FtsW-mediated transport of fluorescent lipid II is demonstrated in reconstituted membranes; its native contribution remains unresolved.
Reason: Purified FtsW promoted lipid-II translocation in proteoliposomes, so the measured capacity is retained as real. However, MurJ performs the essential native flipping step, and no physiological contribution by FtsW is established. This exceeds support for a genuine secondary physiological function under the enzyme-specificity policy. The residual-FtsW caveat in the depletion study prevents a confident claim of zero in-vivo capacity; no quantitative low-efficiency comparison establishes promiscuous noise. MARK_AS_OVER_ANNOTATED therefore records uncertain physiological relevance without discarding the assay or calling it a demonstrated secondary function.
Supporting Evidence:
PMID:21386816
purified FtsW induced the transbilayer movement of Lipid II in model membranes
PMID:25013077
We found that lipid II flipping remained robust in this background (Figs. S8–S9).
PMID:25013077
Although it is possible that residual FtsW in these cells was sufficient for the observed activity, this result suggests that SEDS proteins are not responsible for lipid II flippase activity in vivo.
GO:0016020 membrane
IEA
GO_REF:0000002
MODIFY
Summary: FtsW is an integral protein of the E. coli inner membrane.
Reason: The generic membrane annotation is correct but the plasma membrane descendant is already supported by the topology and localization annotations. Refine to GO:0005886 rather than treating a true broad location as an over-annotation.
Proposed replacements: plasma membrane
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0032153 cell division site
IBA
GO_REF:0000033
ACCEPT
Summary: PAINT transfer of division-site localization is appropriate for FtsW.
Reason: FtsW is a late septal SEDS protein whose localization to potential division sites has direct E. coli support.
Supporting Evidence:
PMID:11807049
Analysis of FtsW localization confirmed and extended these results; septal localization of FtsW required FtsZ, FtsA, FtsQ, and FtsL but not FtsI.
GO:0032153 cell division site
IDA
PMID:9603865
FtsI and FtsW are localized to the septum in Escherichia col...
ACCEPT
Summary: FtsW was experimentally localized to septa in E. coli.
Reason: This is the precise subcellular location for the septal SEDS-bPBP peptidoglycan synthase containing FtsW.
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0032153 cell division site
IEA
GO_REF:0000104
ACCEPT
Summary: Sequence-feature transfer to cell division site is consistent with FtsW.
Reason: Proteobacterial FtsW proteins are specialized for divisome function, and E. coli FtsW has direct septal localization evidence.
Supporting Evidence:
PMID:11807049
Thus, FtsW is a late recruit to the division site and is essential for subsequent recruitment of its cognate transpeptidase FtsI but not for stabilization of FtsZ rings.
GO:0032153 cell division site
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
ACCEPT
Summary: Review-level division-site annotation agrees with direct localization.
Reason: FtsW functions at the septum as part of the divisome, so the cell division site component is correct.
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0043093 FtsZ-dependent cytokinesis
IEA
GO_REF:0000104
ACCEPT
Summary: UniRule transfer correctly places FtsW in FtsZ-dependent cytokinesis.
Reason: E. coli FtsW is recruited downstream of FtsZ/FtsA/FtsQ/FtsL and is essential for septal peptidoglycan synthesis and subsequent division.
Supporting Evidence:
PMID:11807049
septal localization of FtsW required FtsZ, FtsA, FtsQ, and FtsL but not FtsI.
GO:0043093 FtsZ-dependent cytokinesis
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
ACCEPT
Summary: FtsW belongs to the FtsZ-dependent bacterial cytokinetic machinery.
Reason: FtsW is a core membrane synthase of the FtsZ-organized divisome.
Supporting Evidence:
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
GO:0051301 cell division
IBA
GO_REF:0000033
MODIFY
Summary: FtsW synthesizes the septal glycan framework used in FtsZ-dependent cell division.
Reason: FtsW performs the glycan-polymerization step in the FtsZ-organized divisome. GO:0043093 is a verified descendant of cell division and is already asserted in this review. Use that supported division subtype consistently across the genetic, phylogenetic and electronic rows.
Propagation Review
Root cause: TERM SCOPING PROBLEM
Failure modes: GRANULARITY MISMATCH
Sources checked:
PANTHER:PTN000767103 Β· PTN000767103 SUPPORTS TRANSFER
The source IBD asserts cell division on the FtsW lineage. The target-specific E. coli localization and polymerization evidence supports that inherited claim; refinement here adds the established FtsZ-dependent subtype without declaring the ancestral assertion wrong or requiring the same subtype for every descendant. The lineage loss check found no IRD/IKR.
Proposed replacements: FtsZ-dependent cytokinesis
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0051301 cell division
IEA
GO_REF:0000002
MODIFY
Summary: FtsW synthesizes the septal glycan framework used in FtsZ-dependent cell division.
Reason: FtsW performs the glycan-polymerization step in the FtsZ-organized divisome. GO:0043093 is a verified descendant of cell division and is already asserted in this review. Use that supported division subtype consistently across the genetic, phylogenetic and electronic rows.
Proposed replacements: FtsZ-dependent cytokinesis
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0051301 cell division
IMP
PMID:9006034
Two polypeptide products of the Escherichia coli cell divisi...
MODIFY
Summary: FtsW synthesizes the septal glycan framework used in FtsZ-dependent cell division.
Reason: FtsW performs the glycan-polymerization step in the FtsZ-organized divisome. GO:0043093 is a verified descendant of cell division and is already asserted in this review. Use that supported division subtype consistently across the genetic, phylogenetic and electronic rows.
Proposed replacements: FtsZ-dependent cytokinesis
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0051301 cell division
IMP
PMID:9603865
FtsI and FtsW are localized to the septum in Escherichia col...
MODIFY
Summary: FtsW synthesizes the septal glycan framework used in FtsZ-dependent cell division.
Reason: FtsW performs the glycan-polymerization step in the FtsZ-organized divisome. GO:0043093 is a verified descendant of cell division and is already asserted in this review. Use that supported division subtype consistently across the genetic, phylogenetic and electronic rows.
Proposed replacements: FtsZ-dependent cytokinesis
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:0051301 cell division
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
MODIFY
Summary: FtsW synthesizes the septal glycan framework used in FtsZ-dependent cell division.
Reason: FtsW performs the glycan-polymerization step in the FtsZ-organized divisome. GO:0043093 is a verified descendant of cell division and is already asserted in this review. Use that supported division subtype consistently across the genetic, phylogenetic and electronic rows.
Proposed replacements: FtsZ-dependent cytokinesis
Supporting Evidence:
PMID:33495624
Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
PMID:9603865
FtsW, another essential cell division protein, was also localized to the septum.
GO:1990586 divisome complex
NAS
PMID:28419603
Assembly and activation of the Escherichia coli divisome.
ACCEPT
Summary: FtsW is a late membrane component of the divisome.
Reason: FtsW acts with FtsI/PBP3 in the divisome to make septal peptidoglycan, and its septal recruitment depends on upstream Fts proteins.
Supporting Evidence:
PMID:11807049
Thus, FtsW is a late recruit to the division site and is essential for subsequent recruitment of its cognate transpeptidase FtsI but not for stabilization of FtsZ rings.

Core Functions

FtsW polymerizes lipid-II-derived glycans at the inner-membrane division site as the SEDS catalytic partner of FtsI/PBP3. Target-specific selective-inactivation and septal glycan-labeling experiments in E. coli support its physiological polymerase role, while purified ortholog complexes establish the cognate-bPBP dependence. This core excludes the separate in-vitro lipid-II translocation capacity.

Supporting Evidence:
  • PMID:33495624
    Combined with the recent evidence that purified FtsW possesses PGTase activity5, our results in live E.coli cells strongly support the notion that FtsW is an essential septal PGTase in vivo.
  • PMID:30692671
    We conclude that FtsW is a peptidoglycan polymerase that requires divalent cations and the presence of a bPBP for activity.
  • PMID:9603865
    FtsW, another essential cell division protein, was also localized to the septum.

References

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Suggested Questions for Experts

Q: Does FtsW-mediated lipid-II translocation observed with fluorescent analogues contribute measurable native flux independently of MurJ and glycan polymerization?

πŸ“š Additional Documentation

Notes

(ftsW-notes.md)

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