Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5542
Number of amino acids:190
Molecular Weight:21153.7 Da
Theoretical pI:6.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)126.32%
Cysteine CYS (C)21.05%
Glutamic Acid GLU (E)52.63%
Aspartic Acid ASP (D)136.84%
Glycine GLY (G)126.32%
Phynylalanine PHE (F)147.37%
Isoleucine ILE (I)126.32%
Histidine HIS (H)63.16%
Lysine LYS (K)94.74%
Methionine MET (M)10.53%
Leucine LEU (L)178.95%
Asparagine ASN (N)105.26%
Glutamine GLN (Q)63.16%
Proline PRO (P)84.21%
Serine SER (S)2513.16%
Arginine ARG (R)73.68%
Threonine THR (T)105.26%
Tryptophan TRP (W)21.05%
Valine VAL (V)105.26%
Tyrosine TYR (Y)94.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC958
HydrogenH1446
NitrogenN250
OxygenO287
SulphurS3

FormulaC958H1446N250O287S3
Total Number of Atoms:2944


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24535
Absorption 0.1% (=1 g/l)    1.160,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24410
Absorption 0.1% (=1 g/l)    1.154,   assuming all CYS residues are reduced
Aromaticity:0.132

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.68, 28.95, 18.42]

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:81.1053
Grand average of hydropathicity (GRAVY):-0.18