Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5951
Number of amino acids:279
Molecular Weight:30038.33 Da
Theoretical pI:9.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3412.19%
Cysteine CYS (C)124.3%
Glutamic Acid GLU (E)103.58%
Aspartic Acid ASP (D)124.3%
Glycine GLY (G)2810.04%
Phynylalanine PHE (F)72.51%
Isoleucine ILE (I)51.79%
Histidine HIS (H)51.79%
Lysine LYS (K)72.51%
Methionine MET (M)62.15%
Leucine LEU (L)227.89%
Asparagine ASN (N)51.79%
Glutamine GLN (Q)72.51%
Proline PRO (P)124.3%
Serine SER (S)238.24%
Arginine ARG (R)269.32%
Threonine THR (T)165.73%
Tryptophan TRP (W)62.15%
Valine VAL (V)269.32%
Tyrosine TYR (Y)103.58%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1309
HydrogenH2072
NitrogenN392
OxygenO385
SulphurS18

FormulaC1309H2072N392O385S18
Total Number of Atoms:4176


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48650
Absorption 0.1% (=1 g/l)    1.620,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    1.595,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.24, 24.37, 25.81]

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:76.9534
Grand average of hydropathicity (GRAVY):-0.07