IndraLab

Statements


8 | 1 8 30

sparser
"The binding of SPATA2CYLD or OTULIN to HOIP was shown to be mutually exclusive (Draber et al , xref ; Schlicher et al , xref )."

sparser
"The mechanisms regulating the interaction of LUBAC with OTULIN and SPATA2-CYLD in cells are not well-understood but in vitro studies show that phosphorylation of the tyrosine (Y56) in the OTULIN PIM abrogates its interaction with HOIP, suggesting that this may be a mechanism to regulate the LUBAC–OTULIN complex [32]."

sparser
"LUBAC co-recruits SPATA2-CYLD to receptor signalling complexes where CYLD regulates Lys63-and Met1-Ub of substrates and thereby inflammatory and cell death signalling decisions [31, 33, 35, 57]."

sparser
"These results were corroborated by in vitro pull-downs and surface plasmon resonance (SPR), which revealed the CYLD-SPATA2 interaction to be high affinity (96 nM), and also showed no binding of the isolated B-box domain to SPATA2 ( xref C, 3D, xref D, and S3E)."

No evidence text available

sparser
"Our data indicate that CYLD-SPATA2, the IKK complex members, and WHIP itself are significantly enriched in isolates of endogenous UBASH3B. Using synthetic peptides spiked into the sample to perform absolute quantification of endogenously expressed proteins, we found that the binding of TNF-RSC components to UBASH3B was, with the exception of ubiquitin, highly substoichiometric ( xref )."

sparser
"The mechanisms regulating the interaction of LUBAC with OTULIN and SPATA2-CYLD in cells are not well-understood but in vitro studies show that phosphorylation of the tyrosine (Y56) in the OTULIN PIM abrogates its interaction with HOIP, suggesting that this may be a mechanism to regulate the LUBAC–OTULIN complex [ xref ]."

No evidence text available

sparser
"In line with the in vitro analysis, substitution of the conserved Tyr338 in the SPATA2 PIM to Ala (Y338A) or Phe (Y338F) largely abrogated the interaction of SPATA2 with HOIP in cells, without affecting SPATA2 binding to CYLD ( xref G)."

sparser
"The PUB domain of HOIP can also interact with SPATA2 that binds CYLD and thereby bridges this deubiquitinase to LUBAC (Elliott et al., xref ; Kupka et al., xref ; Schlicher et al., xref ; Wagner et al., xref )."

sparser
"Importantly, LUBAC binds negative regulators of deubiquitinases (DUBs), such as OTULIN and the CYLD-SPATA2 complex, through the N-terminal PUB domain of HOIP ( xref – xref )."

sparser
"The Met1-Ub machinery (LUBAC, OTULIN, and CYLD-SPATA2) generates (and removes) Met1-Ub."

reach
"In line with the invitro analysis, substitution of the conserved Tyr338 in the SPATA2 PIM to Ala (Y338A) or Phe (Y338F) largely abrogated the interaction of SPATA2 with HOIP in cells, without affecting SPATA2 binding to CYLD (XREF_FIG G)."

sparser
"It is possible that SPATA2 binding to a CYLD dimer creates additional interactions that stabilize the hetero-tetrameric complex, and further structural work is required to illuminate this."

sparser
"Hence, CYLD and SPATA2 form a highly stable heterotetramer in vitro and likely in cells, which is destabilized when the core dimerization domain, the B-box of CYLD, is deleted or disrupted."

reach
"SPATA2 Binds CYLD in a B-box-Dependent Manner."

No evidence text available

sparser
"In the absence of OTULIN, only CYLD-SPATA2-LUBAC complexes can form [ xref – xref ], and conversely, without CYLD, only OTULIN-LUBAC complexes can assemble [ xref – xref ]."

sparser
"Characterization of the CYLD-SPATA2 Interaction."

sparser
"To do this, we focused on CYLD-SPATA2, which is substoichiometric with respect to the TNFR1 receptor."

sparser
"OTULIN-released LUBAC interacts with SPATA2 and is recruited to the TNF-R1sc, facilitating SPATA2-CYLD interaction."

sparser
"Strikingly, SPATA2 did not interact with monomeric CYLD ΔB-box, and while the CYLD-SPATA2 binding interface does not appear to involve the B-box itself, SPR measurements reveal diminished complex stability when CYLD is monomeric."

sparser
"This could be due to LUBAC in cells interacting with cellular components such as SPATA2 and CYLD ( xref ; xref ; xref ; xref )."

reach
"Although LUBEL apparently lacks the PUB domain found in HOIP (Fig XREF_FIG A), which is important for recruiting a SPATA2 and CYLD complex in mammals 36, we could detect an interaction between the LUBEL-RBR-C domain and dCYLD in pulldown experiments (Fig XREF_FIG C and D)."

No evidence text available

sparser
"The binding of MALT1 to the HOIP PUB domain did not disturb the association with OTULIN ( xref ), indicating that MALT1 simultaneously binds LUBAC with DUBs, such as OTULIN and CYLD-SPATA2, through the HOIP PUB domain."

sparser
"The interaction between SPATA2 and CYLD was confirmed in cells by co-immunoprecipitation of ectopic or endogenous proteins ( xref F and 1G)."

reach
"Moreover, co-expression of V5 tagged HOIP and SPATA2 variants showed that the SPATA2 PIM is needed to co-immunoprecipitate CYLD and HOIP, demonstrating that the CYLD and SPATA2 complex is linked to LUBAC via the SPATA2 PIM-HOIP PUB interaction (XREF_FIG H)."

sparser
"In keeping with this, our iBAQ analysis indicates that only ∼20 to 25% of LUBAC molecules are bound to CYLD-SPATA2 ()."

No evidence text available

sparser
"LUBAC exists in distinct complexes with the DUBs OTULIN (1) and CYLD-SPATA2 (2)."

reach
"In accordance with the mass spectrometry experiments and the affinity of the CYLD and SPATA2 interaction, this suggests that a substantial fraction of the cellular pool of CYLD is in complex with SPATA2, which links it to LUBAC and possibly other high-order complexes."

trips
"SPATA2 links CYLD to the TNF-α receptor signaling complex and modulates the receptor signaling outcomes."

No evidence text available

reach
"The SPATA2 and CYLD complex also plays a role in the TNF dependent apoptosis pathway [XREF_BIBR]."

sparser
"Since we know that 1) CYLD and SPATA2 are bound in a 2:2 stoichiometry ( xref and) ( xref ), 2) endogenous CYLD and LUBAC components are more abundant than SPATA2 in the proteome profiling of 29 human tissues (), and 3) SPATA2 mediates CYLD recruitment to LUBAC ( xref , xref ), we would predict that only part of the cytoplasmic pool of CYLD is bound to SPATA2 and that as a consequence, CYLD-SPATA2 complex is substoichiometrically bound to the LUBAC complex."

sparser
"DUBs, such as OTULIN and the CYLD-SPATA2 complex, bind to the PUB domain of HOIP and downregulate NF-κB activity by hydrolyzing the ubiquitin chains ( xref – xref )."

reach
"The N-terminal portion of HOIP contains a PNGase and UBA or UBX (PUB) domain (XREF_FIG), which is reportedly an AAA-ATPase p97 interacting domain [XREF_BIBR] that plays an important role to recruit linear ubiquitin editing DUBs, such as OTULIN [XREF_BIBR] and the CYLD and SPATA2 complex [XREF_BIBR, XREF_BIBR, XREF_BIBR, XREF_BIBR]."

No evidence text available

No evidence text available

sparser
"SPATA2 interacts with CYLD through its non-canonical PUB domain, which binds the catalytic CYLD USP domain in a CYLD B-box-dependent manner."

reach
"The interaction between SPATA2 and CYLD was confirmed in cells by co-immunoprecipitation of ectopic or endogenous proteins (XREF_FIG F and 1G)."

sparser
"The N-terminal portion of HOIP contains a PNGase/UBA or UBX (PUB) domain ( xref ), which is reportedly an AAA-ATPase p97-interacting domain [ xref ] that plays an important role to recruit linear ubiquitin-editing DUBs, such as OTULIN [ xref ] and the CYLD-SPATA2 complex [ xref , xref , xref , xref ]."

sparser
"LUBAC co-recruits SPATA2-CYLD to receptor signalling complexes where CYLD regulates Lys63-and Met1-Ub of substrates and thereby inflammatory and cell death signalling decisions [ xref , xref , xref , xref ]."

sparser
"Our data consistently identify CYLD-SPATA2 as limiting members ( xref and, red dot), and, on average, indicate that most complexes are present in less than one or at most one copy per receptor, even at the peak of recruitment (10 min)."

sparser
"Fig. 2: LUBAC exists in distinct complexes with the DUBs OTULIN (1) and CYLD-SPATA2 (2)."

sparser
"The B-box dependence of the CYLD-SPATA2 interaction ( xref B, 1C, and 1F) could suggest a direct interaction between the B-box and the SPATA2 PUB domain."