Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4776
Number of amino acids:361
Molecular Weight:39131.91 Da
Theoretical pI:5.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)102.77%
Cysteine CYS (C)5615.51%
Glutamic Acid GLU (E)205.54%
Aspartic Acid ASP (D)215.82%
Glycine GLY (G)5013.85%
Phynylalanine PHE (F)82.22%
Isoleucine ILE (I)71.94%
Histidine HIS (H)102.77%
Lysine LYS (K)113.05%
Methionine MET (M)51.39%
Leucine LEU (L)205.54%
Asparagine ASN (N)174.71%
Glutamine GLN (Q)205.54%
Proline PRO (P)113.05%
Serine SER (S)287.76%
Arginine ARG (R)164.43%
Threonine THR (T)133.6%
Tryptophan TRP (W)133.6%
Valine VAL (V)195.26%
Tyrosine TYR (Y)61.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1614
HydrogenH2460
NitrogenN490
OxygenO528
SulphurS61

FormulaC1614H2460N490O528S61
Total Number of Atoms:5153


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83940
Absorption 0.1% (=1 g/l)    2.145,   assuming all pairs of CYS residues form cystines

Ext. coefficient    80440
Absorption 0.1% (=1 g/l)    2.056,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.22, 29.36, 15.24]

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:47.2022
Grand average of hydropathicity (GRAVY):-0.36