Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5821
Number of amino acids:221
Molecular Weight:24545.55 Da
Theoretical pI:8.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)52.26%
Cysteine CYS (C)94.07%
Glutamic Acid GLU (E)52.26%
Aspartic Acid ASP (D)114.98%
Glycine GLY (G)156.79%
Phynylalanine PHE (F)156.79%
Isoleucine ILE (I)146.33%
Histidine HIS (H)10.45%
Lysine LYS (K)135.88%
Methionine MET (M)31.36%
Leucine LEU (L)2410.86%
Asparagine ASN (N)167.24%
Glutamine GLN (Q)52.26%
Proline PRO (P)198.6%
Serine SER (S)188.14%
Arginine ARG (R)73.17%
Threonine THR (T)135.88%
Tryptophan TRP (W)31.36%
Valine VAL (V)188.14%
Tyrosine TYR (Y)73.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1121
HydrogenH1739
NitrogenN281
OxygenO313
SulphurS12

FormulaC1121H1739N281O313S12
Total Number of Atoms:3466


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27430
Absorption 0.1% (=1 g/l)    1.118,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.097,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.65, 30.77, 16.74]

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:92.9411
Grand average of hydropathicity (GRAVY):0.10