Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1310
Number of amino acids:226
Molecular Weight:24551.54 Da
Theoretical pI:5.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)146.19%
Cysteine CYS (C)177.52%
Glutamic Acid GLU (E)62.65%
Aspartic Acid ASP (D)104.42%
Glycine GLY (G)2310.18%
Phynylalanine PHE (F)177.52%
Isoleucine ILE (I)73.1%
Histidine HIS (H)10.44%
Lysine LYS (K)52.21%
Methionine MET (M)31.33%
Leucine LEU (L)114.87%
Asparagine ASN (N)219.29%
Glutamine GLN (Q)125.31%
Proline PRO (P)208.85%
Serine SER (S)125.31%
Arginine ARG (R)93.98%
Threonine THR (T)177.52%
Tryptophan TRP (W)31.33%
Valine VAL (V)114.87%
Tyrosine TYR (Y)73.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1074
HydrogenH1604
NitrogenN296
OxygenO328
SulphurS20

FormulaC1074H1604N296O328S20
Total Number of Atoms:3322


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.138,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.097,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.78, 33.63, 15.04]

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:51.3717
Grand average of hydropathicity (GRAVY):-0.30