Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4274
Number of amino acids:397
Molecular Weight:42927.84 Da
Theoretical pI:5.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)348.56%
Cysteine CYS (C)112.77%
Glutamic Acid GLU (E)123.02%
Aspartic Acid ASP (D)287.05%
Glycine GLY (G)369.07%
Phynylalanine PHE (F)143.53%
Isoleucine ILE (I)297.3%
Histidine HIS (H)61.51%
Lysine LYS (K)205.04%
Methionine MET (M)92.27%
Leucine LEU (L)317.81%
Asparagine ASN (N)287.05%
Glutamine GLN (Q)174.28%
Proline PRO (P)164.03%
Serine SER (S)256.3%
Arginine ARG (R)153.78%
Threonine THR (T)235.79%
Tryptophan TRP (W)82.02%
Valine VAL (V)297.3%
Tyrosine TYR (Y)61.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1887
HydrogenH2985
NitrogenN527
OxygenO577
SulphurS20

FormulaC1887H2985N527O577S20
Total Number of Atoms:5996


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53565
Absorption 0.1% (=1 g/l)    1.248,   assuming all pairs of CYS residues form cystines

Ext. coefficient    52940
Absorption 0.1% (=1 g/l)    1.233,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.47, 26.45, 21.66]

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:88.6902
Grand average of hydropathicity (GRAVY):-0.10