Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1309
Number of amino acids:226
Molecular Weight:24666.61 Da
Theoretical pI:5.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)146.19%
Cysteine CYS (C)167.08%
Glutamic Acid GLU (E)73.1%
Aspartic Acid ASP (D)114.87%
Glycine GLY (G)2310.18%
Phynylalanine PHE (F)177.52%
Isoleucine ILE (I)73.1%
Histidine HIS (H)10.44%
Lysine LYS (K)62.65%
Methionine MET (M)31.33%
Leucine LEU (L)114.87%
Asparagine ASN (N)208.85%
Glutamine GLN (Q)104.42%
Proline PRO (P)177.52%
Serine SER (S)135.75%
Arginine ARG (R)104.42%
Threonine THR (T)187.96%
Tryptophan TRP (W)31.33%
Valine VAL (V)114.87%
Tyrosine TYR (Y)83.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1079
HydrogenH1613
NitrogenN297
OxygenO332
SulphurS19

FormulaC1079H1613N297O332S19
Total Number of Atoms:3340


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    29420
Absorption 0.1% (=1 g/l)    1.193,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.152,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.60

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.22, 32.30, 15.49]

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):-0.33