Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6163
Number of amino acids:220
Molecular Weight:23183.63 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)125.45%
Cysteine CYS (C)31.36%
Glutamic Acid GLU (E)41.82%
Aspartic Acid ASP (D)73.18%
Glycine GLY (G)188.18%
Phynylalanine PHE (F)198.64%
Isoleucine ILE (I)73.18%
Histidine HIS (H)31.36%
Lysine LYS (K)94.09%
Methionine MET (M)31.36%
Leucine LEU (L)2310.45%
Asparagine ASN (N)167.27%
Glutamine GLN (Q)41.82%
Proline PRO (P)177.73%
Serine SER (S)2712.27%
Arginine ARG (R)52.27%
Threonine THR (T)177.73%
Tryptophan TRP (W)10.45%
Valine VAL (V)2511.36%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1051
HydrogenH1647
NitrogenN271
OxygenO307
SulphurS6

FormulaC1051H1647N271O307S6
Total Number of Atoms:3282


Total number of positively charged residues (ARG + LYS):14
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    5625
Absorption 0.1% (=1 g/l)    0.243,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.237,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.09, 35.45, 19.09]

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:91.5906
Grand average of hydropathicity (GRAVY):0.31