Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5963
Number of amino acids:86
Molecular Weight:9086.46 Da
Theoretical pI:5.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.98%
Cysteine CYS (C)910.47%
Glutamic Acid GLU (E)44.65%
Aspartic Acid ASP (D)33.49%
Glycine GLY (G)78.14%
Phynylalanine PHE (F)44.65%
Isoleucine ILE (I)11.16%
Histidine HIS (H)11.16%
Lysine LYS (K)00%
Methionine MET (M)55.81%
Leucine LEU (L)89.3%
Asparagine ASN (N)44.65%
Glutamine GLN (Q)11.16%
Proline PRO (P)22.33%
Serine SER (S)1315.12%
Arginine ARG (R)55.81%
Threonine THR (T)44.65%
Tryptophan TRP (W)00%
Valine VAL (V)89.3%
Tyrosine TYR (Y)11.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC377
HydrogenH608
NitrogenN108
OxygenO124
SulphurS14

FormulaC377H608N108O124S14
Total Number of Atoms:1231


Total number of positively charged residues (ARG + LYS):5
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    1990
Absorption 0.1% (=1 g/l)    0.219,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.164,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.58, 30.23, 26.74]

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:74.7675
Grand average of hydropathicity (GRAVY):0.40