8QV3

Structure of the y-Tubulin Small Complex (yTuSC) as part of the native y-Tubulin Ring Complex (yTuRC) capping microtubule minus ends at the spindle pole body


Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
C [auth E]PF17681Gamma tubulin complex component N-terminal (GCP_N_terminal)Gamma tubulin complex component N-terminalThis is the N-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthe ...This is the N-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthermore, family members such as human GCP4 (Gamma-tubulin complex component 4) have been structurally elucidated Swiss:Q9UGJ1 [2]. Functional studies have shown that the N-terminal domain defines the functional identity of GCPs, suggesting that all GCPs are incorporated into the helix of gamma-tubulin small complexes (gTURCs) via lateral interactions between their N-terminal domains. Thereby, they define the direct neighbors and position the GCPs within the helical wall of gTuRC [3]. Sequence alignment of human GCPs based on the GCP4 structure helped delineate conserved regions in the N- and C-terminal domains [2]. In addition to the conserved sequences, the N-terminal domains carry specific insertions of various sizes depending on the GCP, i.e. internal insertions or N-terminal extensions. These insertions may equally contribute to the function of individual GCPs as they have been implied in specific interactions with regulatory or structural proteins. For instance, GCP6 carries a large internal insertion phosphorylated by Plk4 and containing a domain of interaction with keratins, whereas the N-terminal extension of GCP3 interacts with the recruitment protein MOZART1[3].
Domain
C [auth E]PF04130Gamma tubulin complex component C-terminal (GCP_C_terminal)Gamma tubulin complex component C-terminalThis is the C-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthe ...This is the C-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthermore, family members such as human GCP4 (Gamma-tubulin complex component 4) have been structurally elucidated Swiss:Q9UGJ1 . Structure-based sequence analysis revealed the existence of an exposed surface area conserved in all human GCPs and in GCP4 orthologs. This area is located in the C-terminal domain of GCP4, which was confirmed in vitro to bind directly to gamma-tubulin. Sequence alignment of human GCPs based on the GCP4 structure helped delineate conserved regions in the N- and C-terminal domains [2].
Domain
D [auth F]PF17681Gamma tubulin complex component N-terminal (GCP_N_terminal)Gamma tubulin complex component N-terminalThis is the N-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthe ...This is the N-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthermore, family members such as human GCP4 (Gamma-tubulin complex component 4) have been structurally elucidated Swiss:Q9UGJ1 [2]. Functional studies have shown that the N-terminal domain defines the functional identity of GCPs, suggesting that all GCPs are incorporated into the helix of gamma-tubulin small complexes (gTURCs) via lateral interactions between their N-terminal domains. Thereby, they define the direct neighbors and position the GCPs within the helical wall of gTuRC [3]. Sequence alignment of human GCPs based on the GCP4 structure helped delineate conserved regions in the N- and C-terminal domains [2]. In addition to the conserved sequences, the N-terminal domains carry specific insertions of various sizes depending on the GCP, i.e. internal insertions or N-terminal extensions. These insertions may equally contribute to the function of individual GCPs as they have been implied in specific interactions with regulatory or structural proteins. For instance, GCP6 carries a large internal insertion phosphorylated by Plk4 and containing a domain of interaction with keratins, whereas the N-terminal extension of GCP3 interacts with the recruitment protein MOZART1[3].
Domain
D [auth F]PF04130Gamma tubulin complex component C-terminal (GCP_C_terminal)Gamma tubulin complex component C-terminalThis is the C-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthe ...This is the C-terminal domain found in components of the gamma-tubulin complex proteins (GCPs). Family members include spindle pole body (SBP) components such as Spc97 and Spc98 which function as the microtubule-organizing center in yeast [1]. Furthermore, family members such as human GCP4 (Gamma-tubulin complex component 4) have been structurally elucidated Swiss:Q9UGJ1 . Structure-based sequence analysis revealed the existence of an exposed surface area conserved in all human GCPs and in GCP4 orthologs. This area is located in the C-terminal domain of GCP4, which was confirmed in vitro to bind directly to gamma-tubulin. Sequence alignment of human GCPs based on the GCP4 structure helped delineate conserved regions in the N- and C-terminal domains [2].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth c],
B [auth d]
Tubulin gamma chain
C [auth E]Spindle pole body component
D [auth F]Spindle pole body component
E [auth Sc],
F [auth Sd]
Spindle pole body component 110- -
G [auth Ad],
H [auth Ac]
Tubulin alpha-1 chain
I [auth Bd],
J [auth Bc]
Tubulin beta chain
K [auth Uc]Unknown protein---
L [auth Ud]Unknown protein---

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A [auth c],
B [auth d]
IPR003008Tubulin/FtsZ, GTPase domainDomain
A [auth c],
B [auth d]
IPR008280Tubulin/FtsZ, C-terminalHomologous Superfamily
A [auth c],
B [auth d]
IPR037103Tubulin/FtsZ-like, C-terminal domainHomologous Superfamily
A [auth c],
B [auth d]
IPR002454Gamma tubulinFamily
A [auth c],
B [auth d]
IPR017975Tubulin, conserved siteConserved Site
A [auth c],
B [auth d]
IPR000217TubulinFamily
A [auth c],
B [auth d]
IPR023123Tubulin, C-terminalHomologous Superfamily
A [auth c],
B [auth d]
IPR018316Tubulin/FtsZ, 2-layer sandwich domainDomain
A [auth c],
B [auth d]
IPR036525Tubulin/FtsZ, GTPase domain superfamilyHomologous Superfamily
C [auth E]IPR040457Gamma tubulin complex component, C-terminalDomain
C [auth E]IPR042241Gamma-tubulin complex component, C-terminal domain superfamilyHomologous Superfamily
C [auth E]IPR007259Gamma-tubulin complex component proteinFamily
C [auth E]IPR041470Gamma tubulin complex component protein, N-terminalDomain
D [auth F]IPR040457Gamma tubulin complex component, C-terminalDomain
D [auth F]IPR042241Gamma-tubulin complex component, C-terminal domain superfamilyHomologous Superfamily
D [auth F]IPR007259Gamma-tubulin complex component proteinFamily
D [auth F]IPR041470Gamma tubulin complex component protein, N-terminalDomain
E [auth Sc],
F [auth Sd]
IPR040593Spindle pole body component 110, C-terminalDomain
G [auth Ad],
H [auth Ac]
IPR008280Tubulin/FtsZ, C-terminalHomologous Superfamily
G [auth Ad],
H [auth Ac]
IPR017975Tubulin, conserved siteConserved Site
G [auth Ad],
H [auth Ac]
IPR023123Tubulin, C-terminalHomologous Superfamily
G [auth Ad],
H [auth Ac]
IPR018316Tubulin/FtsZ, 2-layer sandwich domainDomain
G [auth Ad],
H [auth Ac]
IPR003008Tubulin/FtsZ, GTPase domainDomain
G [auth Ad],
H [auth Ac]
IPR037103Tubulin/FtsZ-like, C-terminal domainHomologous Superfamily
G [auth Ad],
H [auth Ac]
IPR002452Alpha tubulinFamily
G [auth Ad],
H [auth Ac]
IPR000217TubulinFamily
G [auth Ad],
H [auth Ac]
IPR036525Tubulin/FtsZ, GTPase domain superfamilyHomologous Superfamily
I [auth Bd],
J [auth Bc]
IPR003008Tubulin/FtsZ, GTPase domainDomain
I [auth Bd],
J [auth Bc]
IPR008280Tubulin/FtsZ, C-terminalHomologous Superfamily
I [auth Bd],
J [auth Bc]
IPR037103Tubulin/FtsZ-like, C-terminal domainHomologous Superfamily
I [auth Bd],
J [auth Bc]
IPR017975Tubulin, conserved siteConserved Site
I [auth Bd],
J [auth Bc]
IPR000217TubulinFamily
I [auth Bd],
J [auth Bc]
IPR023123Tubulin, C-terminalHomologous Superfamily
I [auth Bd],
J [auth Bc]
IPR002453Beta tubulinFamily
I [auth Bd],
J [auth Bc]
IPR013838Beta tubulin, autoregulation binding siteBinding Site
I [auth Bd],
J [auth Bc]
IPR018316Tubulin/FtsZ, 2-layer sandwich domainDomain
I [auth Bd],
J [auth Bc]
IPR036525Tubulin/FtsZ, GTPase domain superfamilyHomologous Superfamily