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PEPDIA-INT-027045

Gold

Zein alpha fragment G

Quality

Source DBs

Activities

Source refs

Literature

Patents

Integrated record

Sequence and molecular profile

IRAQQ

Indexed sequence5 aa

1IRAQQ

Length

Molecular weight

614.71 Da

Formula

C25H46N10O8

Structure type

Linear

Synthesis

Chirality

Family

Gene

Residue composition

Physicochemical profile

Hydrophobic2

Membrane affinity proxy

Polar2

Solubility proxy

Charged1

Net charge proxy +1

Aromatic0

Binding interaction proxy

Versioned scientific descriptors

Physicochemical properties and standard representations

calculated sequence and structure

Reported properties

Legacy compatibility fields are materialized from the versioned PepDiana computed release; no separate source-reported property is available.

Computed properties

physchem-20260620

Molecular weight

614.6949 Da

Molecular formula

C25H46N10O8

Theoretical pI

9.75

Net charge at pH 7

0.7601

GRAVY

-1.04

Instability index

46.52

Aromaticity

Topological polar surface area

327.8 Å²

cLogP

-3.8022

Hydrogen-bond donors

Hydrogen-bond acceptors

Rotatable bonds

Method: PepDiana sequence/structure descriptor pipeline

Tool: Biopython+RDKit · Biopython 1.85; RDKit 2024.09.6

Calculated: 2026-06-20T11:01:38.358971+00:00

Assumptions: ph=7; termini=free N-terminus and free C-terminus for simple linear peptides; stereochemistry=standard L-amino acids; smiles_length_limit=200

Sequence representations

representations-20260620 · RDKit 2024.09.6

ProForma 2.0

validated simple linear

IRAQQ

HELM 2.0

validated simple linear

PEPTIDE1{I.R.A.Q.Q}$$$$V2.0

Canonical SMILES

validated

CCC(C)C(N)C(=O)NC(CCCNC(=N)N)C(=O)NC(C)C(=O)NC(CCC(N)=O)C(=O)NC(CCC(N)=O)C(=O)O

Isomeric SMILES

validated

CC[C@H](C)[C@H](N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCC(N)=O)C(=O)O

Follow-up research

External analysis tools

Run BLASTPSearch similar protein or peptide sequences at NCBI.Search UniProtLook for related UniProtKB entries using the sequence.Search PubMedFind literature context for this peptide record.Search PubChemOpen chemistry search with the canonical SMILES string.

Links open third-party resources with the current PepDiana sequence, record name, or chemistry notation as the initial query.

Research workflow

Citation and local history

BibTeX

@misc{PEPDIA-INT-027045,
  title = {Zein alpha fragment G},
  author = {{PepDiana Consortium}},
  year = {2026},
  howpublished = {PepDiana Multifunctional Peptide Database},
  url = {http://127.0.0.1:3004/peptides/PEPDIA-INT-027045},
  note = {Accessed from local PepDiana development build}
}

APA-style note

Zein alpha fragment G. (2026). PepDiana record PEPDIA-INT-027045. PepDiana Multifunctional Peptide Database. http://127.0.0.1:3004/peptides/PEPDIA-INT-027045

This record is saved to local recent-view history so it can reappear on the peptide browser page.

Integrated source-database annotations

Biological activity (6 records)

Stable record	Activity	Subtype	Value	Target	Assay method	Source
CTPDB_P027045_ACT_ahtpdb_0000	Metabolic/Cardiovascular	ACE Inhibitor	81.0 µM	Unknown	Not reported by source	2438ahtpdb / linked
CTPDB_P027045_ACT_ahtpdb_0001	Metabolic/Cardiovascular	ACE Inhibitor	160.0 µM	Unknown	Not reported by source	5321ahtpdb / linked
CTPDB_P027045_ACT_ahtpdb_0002	Metabolic/Cardiovascular	ACE Inhibitor	160.0 µM	Unknown	Cushman and Cheung (1971)	5813ahtpdb / linked
CTPDB_P027045_ACT_ahtpdb_0003	Metabolic/Cardiovascular	ACE Inhibitor	4.2 µM	Unknown	Not reported by source	6435ahtpdb / linked
CTPDB_P027045_ACT_plantpepdb_0004	Enzyme Inhibitor	General Enzyme Inhibitor	Not available in the current structured import	Unknown	Not reported by source	PPepDB_2918plantpepdb / linked
CTPDB_P027045_ACT_satpdb_0005	Metabolic/Cardiovascular	Antihypertensive	Not available for this observation	Unknown	Not reported by source	satpdb27478satpdb / linked

Provenance

Source database records (6)

ahtpdb

2438

Raw sequence

IRAQQ

ahtpdb

6435

Raw sequence

IRAQQ

ahtpdb

5321

Raw sequence

IRAQQ

ahtpdb

5813

Raw sequence

IRAQQ

plantpepdb

PPepDB_2918

Raw sequence

IRAQQ

satpdb

satpdb27478

Raw sequence

IRAQQ

Citation trail

Literature (3 records)

A new QSAR model, for angiotensin I-converting enzyme inhibitory oligopeptides.

Sagardia I1, Roa-Ureta RH, Bald C.

Food Chem. 2013 Feb 15;136(3-4):1370-6.2013PMID 23194537

Structure and activity of angiotensin I converting enzyme inhibitory peptides from sake and sake lees

Saito, Y et al.,

Biosc Biotechnol Biochem 58 p.1767-711991PMID 1368684

Integration of QSAR modelling and QM/MM analysis to investigate functional food peptides with antihypertensive activity

Jin Tan et al.

Molecular Simulation Volume 39, Issue 12, 20132013

Audit surface

Raw annotations and release metadata

Integrated record last updated: 2026-04-15T00:59:11.113046+00:00

Modification summary

No structured modification annotations are available for this record.

Source metadata

[
  {
    "source_db": "ahtpdb",
    "organism_name": "Unknown"
  },
  {
    "source_db": "plantpepdb",
    "organism_name": "Unknown"
  },
  {
    "source_db": "satpdb",
    "organism_name": "Unknown"
  }
]

Structure metadata

{
  "source_db": "satpdb",
  "dssp_states": "CTTCC"
}