Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5764
Number of amino acids:118
Molecular Weight:11740.9 Da
Theoretical pI:9.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2117.8%
Cysteine CYS (C)86.78%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)32.54%
Glycine GLY (G)108.47%
Phynylalanine PHE (F)10.85%
Isoleucine ILE (I)54.24%
Histidine HIS (H)10.85%
Lysine LYS (K)86.78%
Methionine MET (M)54.24%
Leucine LEU (L)86.78%
Asparagine ASN (N)32.54%
Glutamine GLN (Q)43.39%
Proline PRO (P)65.08%
Serine SER (S)1311.02%
Arginine ARG (R)43.39%
Threonine THR (T)54.24%
Tryptophan TRP (W)00%
Valine VAL (V)1210.17%
Tyrosine TYR (Y)10.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC499
HydrogenH849
NitrogenN147
OxygenO151
SulphurS13

FormulaC499H849N147O151S13
Total Number of Atoms:1659


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1990
Absorption 0.1% (=1 g/l)    0.169,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.127,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.88, 27.12, 28.81]

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:90.2543
Grand average of hydropathicity (GRAVY):0.48