+
Open data
-
Basic information
Entry | ![]() | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Cryo-EM structure of the yeast SPT-ORM2 (ORM2-S3A) complex | |||||||||
![]() | ||||||||||
![]() |
| |||||||||
![]() | ceramide / phosphorylation / TRANSFERASE-INHIBITOR COMPLEX | |||||||||
Function / homology | ![]() positive regulation of sphingolipid biosynthetic process / 3-keto-sphinganine metabolic process / negative regulation of sphingolipid biosynthetic process / multidimensional cell growth / serine palmitoyltransferase complex / : / intracellular sphingolipid homeostasis / serine C-palmitoyltransferase activity / serine C-palmitoyltransferase / ceramide metabolic process ...positive regulation of sphingolipid biosynthetic process / 3-keto-sphinganine metabolic process / negative regulation of sphingolipid biosynthetic process / multidimensional cell growth / serine palmitoyltransferase complex / : / intracellular sphingolipid homeostasis / serine C-palmitoyltransferase activity / serine C-palmitoyltransferase / ceramide metabolic process / regulation of programmed cell death / sphingosine biosynthetic process / embryo development ending in seed dormancy / sphingolipid biosynthetic process / ceramide biosynthetic process / response to unfolded protein / enzyme activator activity / Neutrophil degranulation / pyridoxal phosphate binding / endoplasmic reticulum membrane / apoptotic process / endoplasmic reticulum / identical protein binding / membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Xie T / Gong X | |||||||||
Funding support | 1 items
| |||||||||
![]() | ![]() Title: Collaborative regulation of yeast SPT-Orm2 complex by phosphorylation and ceramide. Authors: Tian Xie / Feitong Dong / Gongshe Han / Xinyue Wu / Peng Liu / Zike Zhang / Jianlong Zhong / Somashekarappa Niranjanakumari / Kenneth Gable / Sita D Gupta / Wenchen Liu / Peter J Harrison / ...Authors: Tian Xie / Feitong Dong / Gongshe Han / Xinyue Wu / Peng Liu / Zike Zhang / Jianlong Zhong / Somashekarappa Niranjanakumari / Kenneth Gable / Sita D Gupta / Wenchen Liu / Peter J Harrison / Dominic J Campopiano / Teresa M Dunn / Xin Gong / ![]() ![]() ![]() Abstract: The homeostatic regulation of serine palmitoyltransferase (SPT) activity in yeast involves N-terminal phosphorylation of Orm proteins, while higher eukaryotes lack these phosphorylation sites. ...The homeostatic regulation of serine palmitoyltransferase (SPT) activity in yeast involves N-terminal phosphorylation of Orm proteins, while higher eukaryotes lack these phosphorylation sites. Although recent studies have indicated a conserved ceramide-mediated feedback inhibition of the SPT-ORM/ORMDL complex in higher eukaryotes, its conservation and relationship with phosphorylation regulation in yeast remain unclear. Here, we determine the structure of the yeast SPT-Orm2 complex in a dephosphomimetic state and identify an evolutionarily conserved ceramide-sensing site. Ceramide stabilizes the dephosphomimetic Orm2 in an inhibitory conformation, facilitated by an intramolecular β-sheet between the N- and C-terminal segments of Orm2. Moreover, we find that a phosphomimetic mutant of Orm2, positioned adjacent to its intramolecular β-sheet, destabilizes the inhibitory conformation of Orm2. Taken together, our findings suggest that both Orm dephosphorylation and ceramide binding are crucial for suppressing SPT activity in yeast. This highlights a distinctive regulatory mechanism in yeast involving the collaborative actions of phosphorylation and ceramide. | |||||||||
History |
|
-
Structure visualization
Supplemental images |
---|
-
Downloads & links
-EMDB archive
Map data | ![]() | 59.9 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 18.5 KB 18.5 KB | Display Display | ![]() |
Images | ![]() | 59.4 KB | ||
Filedesc metadata | ![]() | 6.4 KB | ||
Others | ![]() ![]() | 48.4 MB 48.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 923 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 922.5 KB | Display | |
Data in XML | ![]() | 12.2 KB | Display | |
Data in CIF | ![]() | 14.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8iajMC ![]() 8iakC ![]() 8iamC M: atomic model generated by this map C: citing same article ( |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||
Density |
| ||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
|
-Supplemental data
-Half map: #1
File | emd_35304_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: #2
File | emd_35304_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-
Sample components
-Entire : SPT-ORM2 complex
Entire | Name: SPT-ORM2 complex |
---|---|
Components |
|
-Supramolecule #1: SPT-ORM2 complex
Supramolecule | Name: SPT-ORM2 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
---|---|
Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: chimera of Long chain base biosynthesis protein 1 and Serine palm...
Macromolecule | Name: chimera of Long chain base biosynthesis protein 1 and Serine palmitoyltransferase 1 type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: serine C-palmitoyltransferase |
---|---|
Source (natural) | Organism: Saccharomyces cerevisiae S288C / Strain: S288C |
Molecular weight | Theoretical: 59.354672 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MASNLVEMFN AALNWVTMIL ESPSARVVLF GVPIRGHFFV EGLLGVVIII LLTRKSYKPP KRPLTEQEID ELCDEWVPEP LVDPSATDE QSWRVAKTPV TMEMPIQNHI TITRNNLQEK YTNVFNLASN NFLQLSATEP VKEVVKTTIK NYGVGACGPA G FYGNQDVH ...String: MASNLVEMFN AALNWVTMIL ESPSARVVLF GVPIRGHFFV EGLLGVVIII LLTRKSYKPP KRPLTEQEID ELCDEWVPEP LVDPSATDE QSWRVAKTPV TMEMPIQNHI TITRNNLQEK YTNVFNLASN NFLQLSATEP VKEVVKTTIK NYGVGACGPA G FYGNQDVH YTLEYDLAQF FGTQGSVLYG QDFCAAPSVL PAFTKRGDVI VADDQVSLPV QNALQLSRST VYYFNHNDMN SL ECLLNEL TEQEKLEKLP AIPRKFIVTE GIFHNSGDLA PLPELTKLKN KYKFRLFVDE TFSIGVLGAT GRGLSEHFNM DRA TAIDIT VGSMATALGS TGGFVLGDSV MCLHQRIGSN AYCFSACLPA YTVTSVSKVL KLMDSNNDAV QTLQKLSKSL HDSF ASDDS LRSYVIVTSS PVSAVLHLQL TPAYRSRKFG YTCEQLFETM SALQKKSQTN KFIEPYEEEE KFLQSIVDHA LINYN VLIT RNTIVLKQET LPIVPSLKIC CNAAMSPEEL KNACESVKQS ILACCQESNK UniProtKB: Long chain base biosynthesis protein 1, Serine palmitoyltransferase 1 |
-Macromolecule #2: Serine palmitoyltransferase 2
Macromolecule | Name: Serine palmitoyltransferase 2 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO / EC number: serine C-palmitoyltransferase |
---|---|
Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 63.189707 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MSTPANYTRV PLCEPEELPD DIQKENEYGT LDSPGHLYQV KSRHGKPLPE PVVDTPPYYI SLLTYLNYLI LIILGHVHDF LGMTFQKNK HLDLLEHDGL APWFSNFESF YVRRIKMRID DCFSRPTTGV PGRFIRCIDR ISHNINEYFT YSGAVYPCMN L SSYNYLGF ...String: MSTPANYTRV PLCEPEELPD DIQKENEYGT LDSPGHLYQV KSRHGKPLPE PVVDTPPYYI SLLTYLNYLI LIILGHVHDF LGMTFQKNK HLDLLEHDGL APWFSNFESF YVRRIKMRID DCFSRPTTGV PGRFIRCIDR ISHNINEYFT YSGAVYPCMN L SSYNYLGF AQSKGQCTDA ALESVDKYSI QSGGPRAQIG TTDLHIKAEK LVARFIGKED ALVFSMGYGT NANLFNAFLD KK CLVISDE LNHTSIRTGV RLSGAAVRTF KHGDMVGLEK LIREQIVLGQ PKTNRPWKKI LICAEGLFSM EGTLCNLPKL VEL KKKYKC YLFIDEAHSI GAMGPTGRGV CEIFGVDPKD VDILMGTFTK SFGAAGGYIA ADQWIIDRLR LDLTTVSYSE SMPA PVLAQ TISSLQTISG EICPGQGTER LQRIAFNSRY LRLALQRLGF IVYGVADSPV IPLLLYCPSK MPAFSRMMLQ RRIAV VVVA YPATPLIESR VRFCMSASLT KEDIDYLLRH VSEVGDKLNL KSNSGKSSYD GKRQRWDIEE VIRRTPEDCK DDKYFV N UniProtKB: Serine palmitoyltransferase 2 |
-Macromolecule #3: Protein ORM2
Macromolecule | Name: Protein ORM2 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 24.830602 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MIDRTKNESP AFEESPLTPN VSNLKPFPSQ SNKISTPVTD HRRRRAAAVI SHVEQETFED ENDQQMLPNM NATWVDQRGA WLIHIVVIV LLRLFYSLFG STPKWTWTLT NMTYIIGFYI MFHLVKGTPF DFNGGAYDNL TMWEQINDET LYTPTRKFLL I VPIVLFLI ...String: MIDRTKNESP AFEESPLTPN VSNLKPFPSQ SNKISTPVTD HRRRRAAAVI SHVEQETFED ENDQQMLPNM NATWVDQRGA WLIHIVVIV LLRLFYSLFG STPKWTWTLT NMTYIIGFYI MFHLVKGTPF DFNGGAYDNL TMWEQINDET LYTPTRKFLL I VPIVLFLI SNQYYRNDMT LFLSNLAVTV LIGVVPKLGI THRLRISIPG ITGRAQIS UniProtKB: Protein ORM2 |
-Macromolecule #4: Serine palmitoyltransferase-regulating protein TSC3
Macromolecule | Name: Serine palmitoyltransferase-regulating protein TSC3 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 9.590233 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MTQHKSSMVY IPTTKEAKRR NGKSEGILNT IEEVVEKLYW TYYIHLPFYL MASFDSFFLH VFFLTIFSLS FFGILKYCFL UniProtKB: Serine palmitoyltransferase-regulating protein TSC3 |
-Macromolecule #5: PYRIDOXAL-5'-PHOSPHATE
Macromolecule | Name: PYRIDOXAL-5'-PHOSPHATE / type: ligand / ID: 5 / Number of copies: 2 / Formula: PLP |
---|---|
Molecular weight | Theoretical: 247.142 Da |
Chemical component information | ![]() ChemComp-PLP: |
-Macromolecule #6: N-[(2S,3R,4E)-1,3-dihydroxyoctadec-4-en-2-yl]tetracosanamide
Macromolecule | Name: N-[(2S,3R,4E)-1,3-dihydroxyoctadec-4-en-2-yl]tetracosanamide type: ligand / ID: 6 / Number of copies: 2 / Formula: Z1T |
---|---|
Molecular weight | Theoretical: 650.113 Da |
Chemical component information | ![]() ChemComp-Z1T: |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.5 |
---|---|
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
-
Image processing
Startup model | Type of model: NONE |
---|---|
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 121303 |
Initial angle assignment | Type: ANGULAR RECONSTITUTION |
Final angle assignment | Type: ANGULAR RECONSTITUTION |