Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4934
Number of amino acids:312
Molecular Weight:34186.28 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)154.81%
Cysteine CYS (C)30.96%
Glutamic Acid GLU (E)154.81%
Aspartic Acid ASP (D)72.24%
Glycine GLY (G)278.65%
Phynylalanine PHE (F)278.65%
Isoleucine ILE (I)175.45%
Histidine HIS (H)10.32%
Lysine LYS (K)237.37%
Methionine MET (M)30.96%
Leucine LEU (L)299.29%
Asparagine ASN (N)227.05%
Glutamine GLN (Q)185.77%
Proline PRO (P)175.45%
Serine SER (S)299.29%
Arginine ARG (R)61.92%
Threonine THR (T)144.49%
Tryptophan TRP (W)00%
Valine VAL (V)299.29%
Tyrosine TYR (Y)103.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1566
HydrogenH2433
NitrogenN395
OxygenO450
SulphurS6

FormulaC1566H2433N395O450S6
Total Number of Atoms:4850


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):22
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    15025
Absorption 0.1% (=1 g/l)    0.440,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.436,   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 : 33.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.90, 30.45, 19.87]

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:89.2628
Grand average of hydropathicity (GRAVY):0.01