Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5777
Number of amino acids:172
Molecular Weight:19434.74 Da
Theoretical pI:9.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)137.56%
Cysteine CYS (C)21.16%
Glutamic Acid GLU (E)42.33%
Aspartic Acid ASP (D)74.07%
Glycine GLY (G)148.14%
Phynylalanine PHE (F)95.23%
Isoleucine ILE (I)105.81%
Histidine HIS (H)42.33%
Lysine LYS (K)126.98%
Methionine MET (M)84.65%
Leucine LEU (L)137.56%
Asparagine ASN (N)105.81%
Glutamine GLN (Q)42.33%
Proline PRO (P)116.4%
Serine SER (S)63.49%
Arginine ARG (R)63.49%
Threonine THR (T)105.81%
Tryptophan TRP (W)63.49%
Valine VAL (V)158.72%
Tyrosine TYR (Y)84.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC898
HydrogenH1368
NitrogenN230
OxygenO233
SulphurS10

FormulaC898H1368N230O233S10
Total Number of Atoms:2739


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45045
Absorption 0.1% (=1 g/l)    2.318,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    2.311,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.47, 23.84, 22.09]

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:85
Grand average of hydropathicity (GRAVY):0.01