Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4851
Number of amino acids:437
Molecular Weight:49565.37 Da
Theoretical pI:5.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)153.43%
Cysteine CYS (C)102.29%
Glutamic Acid GLU (E)286.41%
Aspartic Acid ASP (D)204.58%
Glycine GLY (G)358.01%
Phynylalanine PHE (F)132.97%
Isoleucine ILE (I)327.32%
Histidine HIS (H)92.06%
Lysine LYS (K)245.49%
Methionine MET (M)102.29%
Leucine LEU (L)398.92%
Asparagine ASN (N)235.26%
Glutamine GLN (Q)132.97%
Proline PRO (P)265.95%
Serine SER (S)388.7%
Arginine ARG (R)153.43%
Threonine THR (T)214.81%
Tryptophan TRP (W)92.06%
Valine VAL (V)255.72%
Tyrosine TYR (Y)327.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2243
HydrogenH3411
NitrogenN569
OxygenO661
SulphurS20

FormulaC2243H3411N569O661S20
Total Number of Atoms:6904


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):48
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    97805
Absorption 0.1% (=1 g/l)    1.973,   assuming all pairs of CYS residues form cystines

Ext. coefficient    97180
Absorption 0.1% (=1 g/l)    1.961,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.32, 27.92, 21.05]

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:83.3867
Grand average of hydropathicity (GRAVY):-0.30