Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4815
Number of amino acids:508
Molecular Weight:56362.09 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)458.86%
Cysteine CYS (C)101.97%
Glutamic Acid GLU (E)305.91%
Aspartic Acid ASP (D)295.71%
Glycine GLY (G)438.46%
Phynylalanine PHE (F)305.91%
Isoleucine ILE (I)244.72%
Histidine HIS (H)132.56%
Lysine LYS (K)295.71%
Methionine MET (M)142.76%
Leucine LEU (L)469.06%
Asparagine ASN (N)265.12%
Glutamine GLN (Q)132.56%
Proline PRO (P)224.33%
Serine SER (S)346.69%
Arginine ARG (R)214.13%
Threonine THR (T)234.53%
Tryptophan TRP (W)71.38%
Valine VAL (V)295.71%
Tyrosine TYR (Y)203.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2530
HydrogenH3874
NitrogenN672
OxygenO743
SulphurS24

FormulaC2530H3874N672O743S24
Total Number of Atoms:7843


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):59
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68925
Absorption 0.1% (=1 g/l)    1.223,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68300
Absorption 0.1% (=1 g/l)    1.212,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.98

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.71, 24.61, 26.57]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:79.1536
Grand average of hydropathicity (GRAVY):-0.20