Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5131
Number of amino acids:252
Molecular Weight:26761.26 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2710.71%
Cysteine CYS (C)83.17%
Glutamic Acid GLU (E)31.19%
Aspartic Acid ASP (D)103.97%
Glycine GLY (G)3212.7%
Phynylalanine PHE (F)145.56%
Isoleucine ILE (I)124.76%
Histidine HIS (H)31.19%
Lysine LYS (K)93.57%
Methionine MET (M)51.98%
Leucine LEU (L)166.35%
Asparagine ASN (N)166.35%
Glutamine GLN (Q)72.78%
Proline PRO (P)93.57%
Serine SER (S)249.52%
Arginine ARG (R)103.97%
Threonine THR (T)145.56%
Tryptophan TRP (W)72.78%
Valine VAL (V)166.35%
Tyrosine TYR (Y)103.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1194
HydrogenH1809
NitrogenN327
OxygenO350
SulphurS13

FormulaC1194H1809N327O350S13
Total Number of Atoms:3693


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    53900
Absorption 0.1% (=1 g/l)    2.014,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53400
Absorption 0.1% (=1 g/l)    1.995,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.76, 32.14, 20.24]

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:72.4603
Grand average of hydropathicity (GRAVY):0.03