Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1307
Number of amino acids:124
Molecular Weight:13003.76 Da
Theoretical pI:4.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1612.9%
Cysteine CYS (C)118.87%
Glutamic Acid GLU (E)97.26%
Aspartic Acid ASP (D)64.84%
Glycine GLY (G)75.65%
Phynylalanine PHE (F)10.81%
Isoleucine ILE (I)43.23%
Histidine HIS (H)00%
Lysine LYS (K)64.84%
Methionine MET (M)32.42%
Leucine LEU (L)64.84%
Asparagine ASN (N)75.65%
Glutamine GLN (Q)21.61%
Proline PRO (P)54.03%
Serine SER (S)129.68%
Arginine ARG (R)43.23%
Threonine THR (T)64.84%
Tryptophan TRP (W)00%
Valine VAL (V)1411.29%
Tyrosine TYR (Y)54.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC546
HydrogenH883
NitrogenN151
OxygenO187
SulphurS14

FormulaC546H883N151O187S14
Total Number of Atoms:1781


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):15
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    8075
Absorption 0.1% (=1 g/l)    0.621,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.573,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.19, 25.00, 27.42]

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:77.0967
Grand average of hydropathicity (GRAVY):0.06