Nascent polypeptide-associated complex subunit alpha
Homo sapiens
State in the Current Structure
| Assembly | Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Associated Components | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|
| 1 | Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count | Chain A; UniProt 81–133 Chain B; UniProt 81–133 | Fragment:NAC domain (UNP RESIDUES 81-133) | IOD IODIDE ION × 5 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8.3;289 K;0.2M potassium citrate tribasic monohydrate (pH 8.3), 20% (w/v) PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K | Resolution 2.40 Å R-free 0.277 |
| 2 | Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count | Chain C; UniProt 81–133 Chain D; UniProt 81–133 | Fragment:NAC domain (UNP RESIDUES 81-133) | IOD IODIDE ION × 3 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8.3;289 K;0.2M potassium citrate tribasic monohydrate (pH 8.3), 20% (w/v) PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K | Resolution 2.40 Å R-free 0.277 |
Other States of the Same Protein in the Database
Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.
| Other PDB | Difference from Current Entry 3MCE | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 28LN XBP1u-stalled RPL4 RNC in complex with NAC Deposited 2026-02-05 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 80 PDB declaration: 86-meric |
Chain Bu
1–215(215 aa)
|
Not recorded | No recorded non-water small molecule | ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions | Resolution 2.70 Å |
| 3LKX Human nac dimerization domain Deposited 2010-01-28 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain B
84–136(53 aa)
Fragment:UNP residues 84-136
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP;pH 5.5;285 K;PEG 6000, Sodium citrate, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 285K
|
Resolution 2.50 Å R-free 0.253 |
| 3MCB Crystal structure of NAC domains of human nascent polypeptide-associated complex (NAC) Deposited 2010-03-29 | Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain A
79–132(54 aa)
Fragment:NAC domain (UNP RESIDUES 79-132)
|
Not recorded | IOD IODIDE ION × 3 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION;pH 5.6;289 K;0.1M sodium citrate (pH 5.6), 0.1 M NaCl, 12% (w/v) PEG 4000, VAPOR DIFFUSION, temperature 289K
|
Resolution 1.90 Å R-free 0.247 |
| 7QWQ Ternary complex of ribosome nascent chain with SRP and NAC Deposited 2022-01-25 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 48 PDB declaration: 52-meric |
Chain t
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 97 ZN ZINC ION × 5 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 2.83 Å |
| 7QWR Structure of the ribosome-nascent chain containing an ER signal sequence in complex with NAC Deposited 2022-01-25 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 45 PDB declaration: 48-meric |
Chain t
1–215(215 aa)
|
Not recorded | ZN ZINC ION × 5 MG MAGNESIUM ION × 97 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 2.90 Å |
| 7QWS Structure of ribosome translating beta-tubulin in complex with TTC5 and NAC Deposited 2022-01-25 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 46 PDB declaration: 49-meric |
Chain t
1–215(215 aa)
|
Not recorded | ZN ZINC ION × 5 MG MAGNESIUM ION × 97 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.40 Å |
| 8P2K Ternary complex of translating ribosome, NAC and METAP1 Deposited 2023-05-16 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain Na
1–215(215 aa)
|
Not recorded | N ANY 5'-MONOPHOSPHATE NUCLEOTIDE × 73 SPD SPERMIDINE × 30 SPM SPERMINE × 3 MG MAGNESIUM ION × 420 UNX UNKNOWN LIGAND × 312 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 AAC ACETYLAMINO-ACETIC ACID × 1 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.6
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 2.90 Å |
| 9F1B Mammalian ternary complex of a translating 80S ribosome, NAC and NatA/E Deposited 2024-04-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 83 PDB declaration: 89-meric |
Chain Ct
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 420 ZN ZINC ION × 8 UNX UNKNOWN LIGAND × 306 IHP INOSITOL HEXAKISPHOSPHATE × 1 SPD SPERMIDINE × 30 SPM SPERMINE × 3 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.4
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.01 Å |
| 9F1C Mammalian quaternary complex of a translating 80S ribosome, NAC, MetAP1 and NatA/E Deposited 2024-04-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 84 PDB declaration: 90-meric |
Chain Ct
1–215(215 aa)
|
Not recorded | UNX UNKNOWN LIGAND × 277 MG MAGNESIUM ION × 420 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 SPD SPERMIDINE × 30 SPM SPERMINE × 3 ZN ZINC ION × 8 IHP INOSITOL HEXAKISPHOSPHATE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.4
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.78 Å |
| 9F1D Mammalian quaternary complex of a translating 80S ribosome, NAC, MetAP1 and NatA/E-HYPK Deposited 2024-04-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 85 PDB declaration: 91-meric |
Chain Ct
1–215(215 aa)
|
Not recorded | UNX UNKNOWN LIGAND × 295 SPD SPERMIDINE × 30 MG MAGNESIUM ION × 420 SPM SPERMINE × 3 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 IHP INOSITOL HEXAKISPHOSPHATE × 1 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.4
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.26 Å |
| 9FQ0 Human NatA-NAC-MAP1 80S ribosome complex Deposited 2024-06-14 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 14 PDB declaration: hexadecameric |
Chain A
1–215(215 aa)
|
Not recorded | IHP INOSITOL HEXAKISPHOSPHATE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 4.67 Å |
| 9I2D NMT1-NAC bound human RNC with 10 amino acid ARF1-linker Deposited 2025-01-20 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.19 Å |
| 9I2E NMT1-NAC bound human ribosome (combined translational states) Deposited 2025-01-20 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 81 PDB declaration: 86-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 256 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.95 Å |
| 9MR4 NAC: Ribosome nascent chain complex(Oxa1L) Deposited 2025-01-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 78 PDB declaration: 84-meric |
Chain EG
1–215(215 aa)
|
Not recorded | ZN ZINC ION × 6 MG MAGNESIUM ION × 285 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.65 Å |
| 9NDP Structure of stalled ribosome and nascent chain in complex with NMT2 and NAC Deposited 2025-02-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 81 PDB declaration: 87-meric |
Chain EG
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 296 ZN ZINC ION × 6 COA COENZYME A × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.7
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.82 Å |
| 9QLO NMT1-NAC bound human RNC with full length ARF1 - State 1 Deposited 2025-03-21 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 G3D GUANOSINE-3'-MONOPHOSPHATE-5'-DIPHOSPHATE × 1 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.47 Å |
| 9QLP NMT1-NAC bound human RNC with full length ARF1 - State 2 Deposited 2025-03-21 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 G3D GUANOSINE-3'-MONOPHOSPHATE-5'-DIPHOSPHATE × 1 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.75 Å |
| 9QLQ NMT1-NAC bound human RNC with full length ARF1 - alternative State Deposited 2025-03-21 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.57 Å |
| 9QQA Ternary complex of translating ribosome, NAC and NMT1 Deposited 2025-03-31 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 81 PDB declaration: 86-meric |
Chain Nt
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 407 UNX UNKNOWN LIGAND × 187 SPD SPERMIDINE × 30 SPM SPERMINE × 3 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.6
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 2.80 Å |
| 9QQB Quaternary complex of a translating ribosome, NAC, NMT1, and NatA Deposited 2025-03-31 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 84 PDB declaration: 89-meric |
Chain Nt
1–215(215 aa)
|
Not recorded | SPD SPERMIDINE × 30 SPM SPERMINE × 3 MG MAGNESIUM ION × 412 UNX UNKNOWN LIGAND × 168 ZN ZINC ION × 8 IHP INOSITOL HEXAKISPHOSPHATE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.6
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.43 Å |
| 9S3B NMT1-NAC bound human RNC with 58 amino acid ARF1-linker - State 1 Deposited 2025-07-24 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.38 Å |
| 9S3C NMT1-NAC bound human RNC with 58 amino acid ARF1-linker - State 2 Deposited 2025-07-24 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 82 PDB declaration: 88-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.42 Å |
| 9S3D NAC bound human RNC with 58 amino acid ARF1-linker Deposited 2025-07-24 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Protein–RNA Heteromer;Protein × 81 PDB declaration: 87-meric |
Chain NA
1–215(215 aa)
|
Not recorded | MG MAGNESIUM ION × 191 ZN ZINC ION × 8 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.32 Å |
| 9SYR Human quaternary complex of a translating 80S ribosome, NAC, MetAP1 and NatD Deposited 2025-10-13 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 80 PDB declaration: 86-meric |
Chain Na
1–215(215 aa)
|
Not recorded | ZN ZINC ION × 10 COA COENZYME A × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.4
cryo-EM vitrification conditions
Cryogen ETHANE-PROPANE
|
Resolution 3.55 Å |
24 other PDB entries and 24 assemblies. Open the comparison page and filter oligomeric states
View Construct and Data Evidence
| UniProt name | NACA_HUMAN |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A; PDBConstruct 9–61; UniProt 81–133 Author chain B; PDBConstruct 9–61; UniProt 81–133 Author chain C; PDBConstruct 9–61; UniProt 81–133 Author chain D; PDBConstruct 9–61; UniProt 81–133 |