Physicochemical Properties of Peptide



PPepDB ID:PPepDB_744
Number of amino acids:95
Molecular Weight:10138.87 Da
Theoretical pI:6.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.42%
Cysteine CYS (C)66.32%
Glutamic Acid GLU (E)66.32%
Aspartic Acid ASP (D)33.16%
Glycine GLY (G)44.21%
Phynylalanine PHE (F)33.16%
Isoleucine ILE (I)99.47%
Histidine HIS (H)00%
Lysine LYS (K)77.37%
Methionine MET (M)11.05%
Leucine LEU (L)99.47%
Asparagine ASN (N)66.32%
Glutamine GLN (Q)11.05%
Proline PRO (P)33.16%
Serine SER (S)88.42%
Arginine ARG (R)22.11%
Threonine THR (T)99.47%
Tryptophan TRP (W)00%
Valine VAL (V)99.47%
Tyrosine TYR (Y)11.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC444
HydrogenH741
NitrogenN115
OxygenO139
SulphurS7

FormulaC444H741N115O139S7
Total Number of Atoms:1446


Total number of positively charged residues (ARG + LYS):9
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    1865
Absorption 0.1% (=1 g/l)    0.184,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.147,   assuming all CYS residues are reduced
Aromaticity:0.042

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.63, 22.11, 25.26]

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:109.789
Grand average of hydropathicity (GRAVY):0.42