Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1163
Number of amino acids:247
Molecular Weight:26192.71 Da
Theoretical pI:7.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2510.12%
Cysteine CYS (C)176.88%
Glutamic Acid GLU (E)104.05%
Aspartic Acid ASP (D)83.24%
Glycine GLY (G)2510.12%
Phynylalanine PHE (F)93.64%
Isoleucine ILE (I)52.02%
Histidine HIS (H)104.05%
Lysine LYS (K)52.02%
Methionine MET (M)31.21%
Leucine LEU (L)228.91%
Asparagine ASN (N)93.64%
Glutamine GLN (Q)83.24%
Proline PRO (P)166.48%
Serine SER (S)208.1%
Arginine ARG (R)135.26%
Threonine THR (T)176.88%
Tryptophan TRP (W)31.21%
Valine VAL (V)166.48%
Tyrosine TYR (Y)62.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1135
HydrogenH1765
NitrogenN331
OxygenO344
SulphurS20

FormulaC1135H1765N331O344S20
Total Number of Atoms:3595


Total number of positively charged residues (ARG + LYS):18
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    26440
Absorption 0.1% (=1 g/l)    1.009,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.971,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.70, 28.34, 24.29]

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:71.5385
Grand average of hydropathicity (GRAVY):-0.06