Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1105
Number of amino acids:125
Molecular Weight:12979.83 Da
Theoretical pI:5.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1310.4%
Cysteine CYS (C)118.8%
Glutamic Acid GLU (E)54%
Aspartic Acid ASP (D)43.2%
Glycine GLY (G)97.2%
Phynylalanine PHE (F)10.8%
Isoleucine ILE (I)86.4%
Histidine HIS (H)10.8%
Lysine LYS (K)43.2%
Methionine MET (M)32.4%
Leucine LEU (L)75.6%
Asparagine ASN (N)118.8%
Glutamine GLN (Q)32.4%
Proline PRO (P)64.8%
Serine SER (S)118.8%
Arginine ARG (R)43.2%
Threonine THR (T)108%
Tryptophan TRP (W)00%
Valine VAL (V)118.8%
Tyrosine TYR (Y)32.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC543
HydrogenH891
NitrogenN157
OxygenO182
SulphurS14

FormulaC543H891N157O182S14
Total Number of Atoms:1787


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
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    5095
Absorption 0.1% (=1 g/l)    0.393,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.344,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.00, 29.60, 22.40]

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:82.72
Grand average of hydropathicity (GRAVY):0.14