Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4748
Number of amino acids:110
Molecular Weight:12091.95 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)54.55%
Cysteine CYS (C)1513.64%
Glutamic Acid GLU (E)43.64%
Aspartic Acid ASP (D)98.18%
Glycine GLY (G)32.73%
Phynylalanine PHE (F)32.73%
Isoleucine ILE (I)21.82%
Histidine HIS (H)32.73%
Lysine LYS (K)87.27%
Methionine MET (M)32.73%
Leucine LEU (L)1210.91%
Asparagine ASN (N)54.55%
Glutamine GLN (Q)43.64%
Proline PRO (P)65.45%
Serine SER (S)1311.82%
Arginine ARG (R)32.73%
Threonine THR (T)43.64%
Tryptophan TRP (W)00%
Valine VAL (V)65.45%
Tyrosine TYR (Y)21.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC505
HydrogenH814
NitrogenN142
OxygenO165
SulphurS18

FormulaC505H814N142O165S18
Total Number of Atoms:1644


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):13
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    3855
Absorption 0.1% (=1 g/l)    0.319,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.246,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.73, 24.55, 21.82]

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:70
Grand average of hydropathicity (GRAVY):-0.16