Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5916
Number of amino acids:99
Molecular Weight:10449.52 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.06%
Cysteine CYS (C)99.09%
Glutamic Acid GLU (E)33.03%
Aspartic Acid ASP (D)11.01%
Glycine GLY (G)55.05%
Phynylalanine PHE (F)11.01%
Isoleucine ILE (I)33.03%
Histidine HIS (H)00%
Lysine LYS (K)1010.1%
Methionine MET (M)55.05%
Leucine LEU (L)77.07%
Asparagine ASN (N)66.06%
Glutamine GLN (Q)22.02%
Proline PRO (P)88.08%
Serine SER (S)1010.1%
Arginine ARG (R)00%
Threonine THR (T)66.06%
Tryptophan TRP (W)00%
Valine VAL (V)1414.14%
Tyrosine TYR (Y)33.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC453
HydrogenH755
NitrogenN117
OxygenO135
SulphurS14

FormulaC453H755N117O135S14
Total Number of Atoms:1474


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):4
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    4970
Absorption 0.1% (=1 g/l)    0.476,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.428,   assuming all CYS residues are reduced
Aromaticity:0.040

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.28, 29.29, 21.21]

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:86.4646
Grand average of hydropathicity (GRAVY):0.33