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- EMDB-23713: 6-Deoxyerythronolide B synthase (DEBS) module 1 in complex with a... -

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Basic information

Entry
Database: EMDB / ID: EMD-23713
Title6-Deoxyerythronolide B synthase (DEBS) module 1 in complex with antibody fragment 1B2: State 1'
Map dataintermediate
Sample
  • Complex: Complex between DEBS (3)M1TE and antibody fragment 1B2
    • Protein or peptide: EryAI,6-deoxyerythronolide-B synthase EryA3, modules 5 and 6 chimera
    • Protein or peptide: 1B2 (heavy chain)
    • Protein or peptide: 1B2 (light chain)
Function / homology
Function and homology information


6-deoxyerythronolide-B synthase / erythronolide synthase activity / macrolide biosynthetic process / phosphopantetheine binding / 3-oxoacyl-[acyl-carrier-protein] synthase activity / antibiotic biosynthetic process / fatty acid biosynthetic process
Similarity search - Function
Polyketide synthase, docking domain superfmaily / Polyketide synthase, thioesterase domain / Thioesterase / Polyketide synthase, docking domain / Erythronolide synthase docking domain / PKS_PP_betabranch / Thioesterase / Thioesterase domain / Polyketide synthase, ketoreductase domain / KR domain ...Polyketide synthase, docking domain superfmaily / Polyketide synthase, thioesterase domain / Thioesterase / Polyketide synthase, docking domain / Erythronolide synthase docking domain / PKS_PP_betabranch / Thioesterase / Thioesterase domain / Polyketide synthase, ketoreductase domain / KR domain / Polyketide synthase, C-terminal extension / Ketoacyl-synthetase C-terminal extension / Malonyl-CoA ACP transacylase, ACP-binding / PKS_KR / Acyl transferase domain superfamily / Acyl transferase / Acyl transferase domain / Acyl transferase domain in polyketide synthase (PKS) enzymes. / Acyl transferase/acyl hydrolase/lysophospholipase / Ketosynthase family 3 (KS3) domain profile. / Polyketide synthase, phosphopantetheine-binding domain / Phosphopantetheine attachment site / Beta-ketoacyl synthase / Beta-ketoacyl synthase, active site / Ketosynthase family 3 (KS3) active site signature. / Polyketide synthase, beta-ketoacyl synthase domain / Beta-ketoacyl synthase, N-terminal / Beta-ketoacyl synthase, C-terminal / Beta-ketoacyl synthase, N-terminal domain / Beta-ketoacyl synthase, C-terminal domain / Phosphopantetheine attachment site / Thiolase-like / Phosphopantetheine attachment site. / Phosphopantetheine attachment site / ACP-like superfamily / Carrier protein (CP) domain profile. / Phosphopantetheine binding ACP domain / Alpha/Beta hydrolase fold / NAD(P)-binding domain superfamily
Similarity search - Domain/homology
6-deoxyerythronolide-B synthase EryA3, modules 5 and 6 / EryAI
Similarity search - Component
Biological speciesSaccharopolyspora erythraea (bacteria) / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.1 Å
AuthorsCogan DP / Zhang K / Chiu W / Khosla C
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM079429 United States
CitationJournal: Science / Year: 2021
Title: Mapping the catalytic conformations of an assembly-line polyketide synthase module.
Authors: Dillon P Cogan / Kaiming Zhang / Xiuyuan Li / Shanshan Li / Grigore D Pintilie / Soung-Hun Roh / Charles S Craik / Wah Chiu / Chaitan Khosla /
Abstract: Assembly-line polyketide synthases, such as the 6-deoxyerythronolide B synthase (DEBS), are large enzyme factories prized for their ability to produce specific and complex polyketide products. By ...Assembly-line polyketide synthases, such as the 6-deoxyerythronolide B synthase (DEBS), are large enzyme factories prized for their ability to produce specific and complex polyketide products. By channeling protein-tethered substrates across multiple active sites in a defined linear sequence, these enzymes facilitate programmed small-molecule syntheses that could theoretically be harnessed to access countless polyketide product structures. Using cryogenic electron microscopy to study DEBS module 1, we present a structural model describing this substrate-channeling phenomenon. Our 3.2- to 4.3-angstrom-resolution structures of the intact module reveal key domain-domain interfaces and highlight an unexpected module asymmetry. We also present the structure of a product-bound module that shines light on a recently described “turnstile” mechanism for transient gating of active sites along the assembly line.
History
DepositionMar 28, 2021-
Header (metadata) releaseNov 17, 2021-
Map releaseNov 17, 2021-
UpdateNov 17, 2021-
Current statusNov 17, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.28
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.28
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7m7h
  • Surface level: 0.28
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23713.png

Downloads & links

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Map

FileDownload / File: emd_23713.map.gz / Format: CCP4 / Size: 144.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationintermediate
Voxel sizeX=Y=Z: 1 Å
Density
Contour LevelBy AUTHOR: 0.28 / Movie #1: 0.28
Minimum - Maximum-0.35845098 - 1.5245433
Average (Standard dev.)0.003100503 (±0.06913672)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions336336336
Spacing336336336
CellA=B=C: 336.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z111
M x/y/z336336336
origin x/y/z0.0000.0000.000
length x/y/z336.000336.000336.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ376376376
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS336336336
D min/max/mean-0.3581.5250.003

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Supplemental data

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Sample components

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Entire : Complex between DEBS (3)M1TE and antibody fragment 1B2

EntireName: Complex between DEBS (3)M1TE and antibody fragment 1B2
Components
  • Complex: Complex between DEBS (3)M1TE and antibody fragment 1B2
    • Protein or peptide: EryAI,6-deoxyerythronolide-B synthase EryA3, modules 5 and 6 chimera
    • Protein or peptide: 1B2 (heavy chain)
    • Protein or peptide: 1B2 (light chain)

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Supramolecule #1: Complex between DEBS (3)M1TE and antibody fragment 1B2

SupramoleculeName: Complex between DEBS (3)M1TE and antibody fragment 1B2
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Saccharopolyspora erythraea (bacteria)
Molecular weightTheoretical: 480 KDa

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Macromolecule #1: EryAI,6-deoxyerythronolide-B synthase EryA3, modules 5 and 6 chimera

MacromoleculeName: EryAI,6-deoxyerythronolide-B synthase EryA3, modules 5 and 6 chimera
type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: 6-deoxyerythronolide-B synthase
Source (natural)Organism: Saccharopolyspora erythraea (bacteria)
Molecular weightTheoretical: 188.550891 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MASTDSEKVA EYLRRATLDL RAARQRIREL EGEPVAVVAM ACRLPGGVST PEEFWELLSE GRDAVAGLPT DRGWDLDSLF HPDPTRSGT AHQRGGGFLT EATAFDPAFF GMSPREALAV DPQQRLMLEL SWEVLERAGI PPTSLQASPT GVFVGLIPQE Y GPRLAEGG ...String:
MASTDSEKVA EYLRRATLDL RAARQRIREL EGEPVAVVAM ACRLPGGVST PEEFWELLSE GRDAVAGLPT DRGWDLDSLF HPDPTRSGT AHQRGGGFLT EATAFDPAFF GMSPREALAV DPQQRLMLEL SWEVLERAGI PPTSLQASPT GVFVGLIPQE Y GPRLAEGG EGVEGYLMTG TTTSVASGRI AYTLGLEGPA ISVDTACSSS LVAVHLACQS LRRGESSLAM AGGVTVMPTP GM LVDFSRM NSLAPDGRCK AFSAGANGFG MAEGAGMLLL ERLSDARRNG HPVLAVLRGT AVNSDGASNG LSAPNGRAQV RVI QQALAE SGLGPADIDA VEAHGTGTRL GDPIEARALF EAYGRDREQP LHLGSVKSNL GHTQAAAGVA GVIKMVLAMR AGTL PRTLH ASERSKEIDW SSGAISLLDE PEPWPAGARP RRAGVSSFGI SGTNAHAIIE EAPQVVEGER VEAGDVVAPW VLSAS SAEG LRAQAARLAA HLREHPGQDP RDIAYSLATG RAALPHRAAF APVDESAALR VLDGLATGNA DGAAVGTSRA QQRAVF VFP GQGWQWAGMA VDLLDTSPVF AAALRECADA LEPHLDFEVI PFLRAEAARR EQDAALSTER VDVVQPVMFA VMVSLAS MW RAHGVEPAAV IGHSQGEIAA ACVAGALSLD DAARVVALRS RVIATMPGNK GMASIAAPAG EVRARIGDRV EIAAVNGP R SVVVAGDSDE LDRLVASCTT ECIRAKRLAV DYASHSSHVE TIRDALHAEL GEDFHPLPGF VPFFSTVTGR WTQPDELDA GYWYRNLRRT VRFADAVRAL AEQGYRTFLE VSAHPILTAA IEEIGDGSGA DLSAIHSLRR GDGSLADFGE ALSRAFAAGV AVDWESVHL GTGARRVPLP TYPFQRERVW LEPKPVARRS TEVDEVSALR YRIEWRPTGA GEPARLDGTW LVAKYAGTAD E TSTAAREA LESAGARVRE LVVDARCGRD ELAERLRSVG EVAGVLSLLA VDEAEPEEAP LALASLADTL SLVQAMVSAE LG CPLWTVT ESAVATGPFE RVRNAAHGAL WGVGRVIALE NPAVWGGLVD VPAGSVAELA RHLAAVVSGG AGEDQLALRA DGV YGRRWV RAAAPATDDE WKPTGTVLVT GGTGGVGGQI ARWLARRGAP HLLLVSRSGP DADGAGELVA ELEALGARTT VAAC DVTDR ESVRELLGGI GDDVPLSAVF HAAATLDDGT VDTLTGERIE RASRAKVLGA RNLHELTREL DLTAFVLFSS FASAF GAPG LGGYAPGNAY LDGLAQQRRS DGLPATAVAW GTWAGSGMAE GPVADRFRRH GVIEMPPETA CRALQNALDR AEVCPI VID VRWDRFLLAY TAQRPTRLFD EIDDARRAAP QAAAEPRVGA LASLPAPERE KALFELVRSH AAAVLGHASA ERVPADQ AF AELGVDSLSA LELRNRLGAA TGVRLPTTTV FDHPDVRTLA AHLTSELGSG TPAREASSAL RDGYRQAGVS GRVRSYLD L LAGLSDFREH FDGSDGFSLD LVDMADGPGE VTVICCAGTA AISGPHEFTR LAGALRGIAP VRAVPQPGYE EGEPLPSSM AAVAAVQADA VIRTQGDKPF VVAGHSAGAL MAYALATELL DRGHPPRGVV LIDVYPPGHQ DAMNAWLEEL TATLFDRETV RMDDTRLTA LGAYDRLTGQ WRPRETGLPT LLVSAGEPMG PWPDDSWKPT WPFEHDTVAV PGDHFTMVQE HADAIARHID A WLGGGNSS SVDKLAAALE HHHHHH

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Macromolecule #2: 1B2 (heavy chain)

MacromoleculeName: 1B2 (heavy chain) / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.447611 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MAEVQLVQSG GGLVQPGRSL RLSCTASGFT FGDYAMSWVR QAPGKGLEWV GFIRSKAYGG TTEYAASVKG RFTISRDDSK SIAYLQMNS LKTEDTAVYY CTRGGTLFDY WGQGTLVTVS SASTKGPSVF PLAPSSKSTS GGTAALGCLV KDYFPEPVTV S WNSGALTS ...String:
MAEVQLVQSG GGLVQPGRSL RLSCTASGFT FGDYAMSWVR QAPGKGLEWV GFIRSKAYGG TTEYAASVKG RFTISRDDSK SIAYLQMNS LKTEDTAVYY CTRGGTLFDY WGQGTLVTVS SASTKGPSVF PLAPSSKSTS GGTAALGCLV KDYFPEPVTV S WNSGALTS GVHTFPAVLQ SSGLYSLSSV VTVPSSSLGT QTYICNVNHK PSNTKVDKKV EPKSCAALVP RGSAHHHHHH AA DYKDDDD KA

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Macromolecule #3: 1B2 (light chain)

MacromoleculeName: 1B2 (light chain) / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 25.715832 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: LFAIPLVVPF YSHSALDVVM TQSPLSLPVT PGEPASISCR SSQSLLHSNG YNYLDWYLQK PGQSPQLLIY LGSNRASGVP DRFSGSGSG TDFTLKISRV EAEDVGVYYC MQSLQTPRLT FGPGTKVDIK RTVAAPSVFI FPPSDEQLKS GTASVVCLLN N FYPRGAKV ...String:
LFAIPLVVPF YSHSALDVVM TQSPLSLPVT PGEPASISCR SSQSLLHSNG YNYLDWYLQK PGQSPQLLIY LGSNRASGVP DRFSGSGSG TDFTLKISRV EAEDVGVYYC MQSLQTPRLT FGPGTKVDIK RTVAAPSVFI FPPSDEQLKS GTASVVCLLN N FYPRGAKV QWKVDNALQS GNSQESVTEQ DSKDSTYSLS STLTLSKADY EKHKVYACEV THQGLSSPVT KSFNRGEC

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration10 mg/mL
BufferpH: 7.2
Component:
ConcentrationFormulaName
100.0 mMC6H8O7citric acid
100.0 mMNaClSodium chloridesodium chloride
10.0 mMC8H18N2O4SHEPES
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELDBright-field microscopy
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average exposure time: 8.5 sec. / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1406538
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 58206

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