Physicochemical Properties of Peptide



PPepDB ID:PPepDB_894
Number of amino acids:234
Molecular Weight:25447.21 Da
Theoretical pI:9.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.84%
Cysteine CYS (C)166.84%
Glutamic Acid GLU (E)31.28%
Aspartic Acid ASP (D)114.7%
Glycine GLY (G)2510.68%
Phynylalanine PHE (F)125.13%
Isoleucine ILE (I)125.13%
Histidine HIS (H)20.85%
Lysine LYS (K)177.26%
Methionine MET (M)20.85%
Leucine LEU (L)177.26%
Asparagine ASN (N)135.56%
Glutamine GLN (Q)52.14%
Proline PRO (P)145.98%
Serine SER (S)166.84%
Arginine ARG (R)93.85%
Threonine THR (T)198.12%
Tryptophan TRP (W)41.71%
Valine VAL (V)93.85%
Tyrosine TYR (Y)125.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1133
HydrogenH1742
NitrogenN304
OxygenO328
SulphurS18

FormulaC1133H1742N304O328S18
Total Number of Atoms:3525


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40880
Absorption 0.1% (=1 g/l)    1.606,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.567,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.21, 29.06, 16.24]

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:66.3248
Grand average of hydropathicity (GRAVY):-0.17