Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6005
Number of amino acids:117
Molecular Weight:11750.86 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1916.24%
Cysteine CYS (C)108.55%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)10.85%
Glycine GLY (G)86.84%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)54.27%
Histidine HIS (H)00%
Lysine LYS (K)65.13%
Methionine MET (M)32.56%
Leucine LEU (L)97.69%
Asparagine ASN (N)119.4%
Glutamine GLN (Q)43.42%
Proline PRO (P)86.84%
Serine SER (S)86.84%
Arginine ARG (R)32.56%
Threonine THR (T)75.98%
Tryptophan TRP (W)00%
Valine VAL (V)1311.11%
Tyrosine TYR (Y)21.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC499
HydrogenH843
NitrogenN147
OxygenO152
SulphurS13

FormulaC499H843N147O152S13
Total Number of Atoms:1654


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
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    3605
Absorption 0.1% (=1 g/l)    0.307,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.254,   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 : 46.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.79, 29.91, 26.50]

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:95.1281
Grand average of hydropathicity (GRAVY):0.46