Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5004
Number of amino acids:368
Molecular Weight:40787.02 Da
Theoretical pI:5.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)349.24%
Cysteine CYS (C)30.82%
Glutamic Acid GLU (E)133.53%
Aspartic Acid ASP (D)318.42%
Glycine GLY (G)4111.14%
Phynylalanine PHE (F)174.62%
Isoleucine ILE (I)195.16%
Histidine HIS (H)133.53%
Lysine LYS (K)205.43%
Methionine MET (M)71.9%
Leucine LEU (L)318.42%
Asparagine ASN (N)143.8%
Glutamine GLN (Q)112.99%
Proline PRO (P)174.62%
Serine SER (S)174.62%
Arginine ARG (R)154.08%
Threonine THR (T)174.62%
Tryptophan TRP (W)154.08%
Valine VAL (V)215.71%
Tyrosine TYR (Y)123.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1851
HydrogenH2775
NitrogenN499
OxygenO528
SulphurS10

FormulaC1851H2775N499O528S10
Total Number of Atoms:5663


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    100505
Absorption 0.1% (=1 g/l)    2.464,   assuming all pairs of CYS residues form cystines

Ext. coefficient    100380
Absorption 0.1% (=1 g/l)    2.461,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 24.18, 23.10]

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:78.7771
Grand average of hydropathicity (GRAVY):-0.29