Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5791
Number of amino acids:140
Molecular Weight:14259.52 Da
Theoretical pI:8.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)64.29%
Cysteine CYS (C)10.71%
Glutamic Acid GLU (E)32.14%
Aspartic Acid ASP (D)42.86%
Glycine GLY (G)1913.57%
Phynylalanine PHE (F)42.86%
Isoleucine ILE (I)75%
Histidine HIS (H)32.14%
Lysine LYS (K)75%
Methionine MET (M)10.71%
Leucine LEU (L)139.29%
Asparagine ASN (N)42.86%
Glutamine GLN (Q)42.86%
Proline PRO (P)2316.43%
Serine SER (S)96.43%
Arginine ARG (R)21.43%
Threonine THR (T)128.57%
Tryptophan TRP (W)00%
Valine VAL (V)1510.71%
Tyrosine TYR (Y)32.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC651
HydrogenH1037
NitrogenN167
OxygenO187
SulphurS2

FormulaC651H1037N167O187S2
Total Number of Atoms:2044


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):7
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    4470
Absorption 0.1% (=1 g/l)    0.313,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.313,   assuming all CYS residues are reduced
Aromaticity:0.050

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.00, 39.29, 16.43]

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:91.0714
Grand average of hydropathicity (GRAVY):0.06