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- PDB-6lid: Heteromeric amino acid transporter b0,+AT-rBAT complex -

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Basic information

Entry
Database: PDB / ID: 6lid
TitleHeteromeric amino acid transporter b0,+AT-rBAT complex
Components
  • Neutral and basic amino acid transport protein rBAT
  • b(0,+)-type amino acid transporter 1
KeywordsMEMBRANE PROTEIN / transporter
Function / homology
Function and homology information


basic amino acid transmembrane transporter activity / Defective SLC3A1 causes cystinuria (CSNU) / Defective SLC7A9 causes cystinuria (CSNU) / basic amino acid transport / broad specificity neutral L-amino acid:basic L-amino acid antiporter activity / L-cystine transmembrane transporter activity / L-cystine transport / L-glutamate transmembrane transport / amino acid transmembrane transport / aspartate transmembrane transport ...basic amino acid transmembrane transporter activity / Defective SLC3A1 causes cystinuria (CSNU) / Defective SLC7A9 causes cystinuria (CSNU) / basic amino acid transport / broad specificity neutral L-amino acid:basic L-amino acid antiporter activity / L-cystine transmembrane transporter activity / L-cystine transport / L-glutamate transmembrane transport / amino acid transmembrane transport / aspartate transmembrane transport / neutral amino acid transport / amino acid transmembrane transporter activity / Amino acid transport across the plasma membrane / neutral L-amino acid transmembrane transporter activity / antiporter activity / Basigin interactions / vacuolar membrane / amino acid transport / brush border membrane / peptide antigen binding / gene expression / protein-containing complex assembly / carbohydrate metabolic process / protein heterodimerization activity / apical plasma membrane / protein-containing complex binding / extracellular exosome / membrane / plasma membrane
Similarity search - Function
: / Amino acid/polyamine transporter I / Amino acid permease / Oligo-1,6-glucosidase, domain 2 / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Glycosyl hydrolase, all-beta / Glycoside hydrolase superfamily
Similarity search - Domain/homology
1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / b(0,+)-type amino acid transporter 1 / Amino acid transporter heavy chain SLC3A1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.7 Å
AuthorsYan, R.H. / Li, Y.N. / Lei, J.L. / Zhou, Q.
Funding support China, 7items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2016YFA0500402 China
Ministry of Science and Technology (MoST, China)2016YFA0501100 China
Ministry of Science and Technology (MoST, China)2015CB910101 China
National Natural Science Foundation of China (NSFC)31621092 China
National Natural Science Foundation of China (NSFC)31630017 China
National Natural Science Foundation of China (NSFC)81861138009 China
National Natural Science Foundation of China (NSFC)31971123 China
CitationJournal: Sci Adv / Year: 2020
Title: Cryo-EM structure of the human heteromeric amino acid transporter bAT-rBAT.
Authors: Renhong Yan / Yaning Li / Yi Shi / Jiayao Zhou / Jianlin Lei / Jing Huang / Qiang Zhou /
Abstract: Heteromeric amino acid transporters (HATs) catalyze the transmembrane movement of amino acids, comprising two subunits, a heavy chain and a light chain, linked by a disulfide bridge. The bAT (SLC7A9) ...Heteromeric amino acid transporters (HATs) catalyze the transmembrane movement of amino acids, comprising two subunits, a heavy chain and a light chain, linked by a disulfide bridge. The bAT (SLC7A9) is a representative light chain of HATs, forming heterodimer with rBAT, a heavy chain which mediates the membrane trafficking of bAT. The bAT-rBAT complex is an obligatory exchanger, which mediates the influx of cystine and cationic amino acids and the efflux of neutral amino acids in kidney and small intestine. Here, we report the cryo-EM structure of the human bAT-rBAT complex alone and in complex with arginine substrate at resolution of 2.7 and 2.3 Å, respectively. The overall structure of bAT-rBAT exists as a dimer of heterodimer consistent with the previous study. A ligand molecule is bound to the substrate binding pocket, near which an occluded pocket is identified, to which we found that it is important for substrate transport.
History
DepositionDec 10, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 29, 2020Provider: repository / Type: Initial release
Revision 1.1Jun 17, 2020Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name
Revision 1.2Jul 1, 2020Group: Database references / Category: citation / citation_author
Item: _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / struct_asym / struct_conn / struct_conn_type / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _entity.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.value / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn_type.id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Nov 6, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

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  • Deposited structure unit
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Assembly

Deposited unit
A: Neutral and basic amino acid transport protein rBAT
B: b(0,+)-type amino acid transporter 1
C: Neutral and basic amino acid transport protein rBAT
D: b(0,+)-type amino acid transporter 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)279,84020
Polymers272,6954
Non-polymers7,14416
Water4,432246
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 4 molecules ACBD

#1: Protein Neutral and basic amino acid transport protein rBAT / NBAT / D2h / Solute carrier family 3 member 1 / b(0 / +)-type amino acid transport protein


Mass: 80691.586 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC3A1, RBAT / Production host: Homo sapiens (human) / References: UniProt: Q07837
#2: Protein b(0,+)-type amino acid transporter 1 / b(0 / +)AT1 / Glycoprotein-associated amino acid transporter b0 / +AT1 / Solute carrier family 7 member 9


Mass: 55656.105 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC7A9, BAT1 / Production host: Homo sapiens (human) / References: UniProt: P82251

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Sugars , 1 types, 10 molecules

#3: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 10
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE

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Non-polymers , 3 types, 252 molecules

#4: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca
#5: Chemical
ChemComp-3PH / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / PHOSPHATIDIC ACID


Mass: 704.998 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C39H77O8P
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 246 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: b0,+AT-rBAT complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weight
IDEntity assembly-IDValue (°)Experimental value
11260 kDa/nmNO
210.05 MDaNO
310.12 MDaNO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: NITROGEN

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

EM software
IDNameVersionCategory
22image acquisition
13RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 127377 / Symmetry type: POINT

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